/*
  SortTable (plus Knowzy Additions, which are of limited value without the server side code :)
  version 2
  7th April 2007
  Stuart Langridge, http://www.kryogenix.org/code/browser/sorttable/
  
  Instructions:
  Download this file
  Add <script src="sorttable.js"></script> to your HTML
  Add class="sortable" to any table you'd like to make sortable
  Click on the headers to sort
  
  Thanks to many, many people for contributions and suggestions.
  Licenced as X11: http://www.kryogenix.org/code/browser/licence.html
  This basically means: do what you want with it.
*/

 
var stIsIE = /*@cc_on!@*/false;

var bCatAdded = false;
var ReviewGroups = null;
var CurrentRevGroup = null;
var ExcluFilters = [];
var PresentFilters = [];
var bSortManu = true;
var bWorldOverride = false;
var bIsIE = false;
var bFilteringInProgress = false;
var nReviewGroupIndex = -1;
var nReviewIndex = -1;
var nBoxIndex = -1;
var nMaxHeight = 0, nMaxImgHeight = 0, nMaxBodHeight = 0, nMaxFootHeight = 0;
var bContainsProducts = false;

function FilterAll(strExcluFilters, strPresentFilters)
{
	//getmetheie8debugger;
	if (navigator.family == "ie4")
		bIsIE = true;
	
	bWorldOverride = document.getElementById("WorldOverride").checked;

	if (strExcluFilters != null && strExcluFilters != "")
		ExcluFilters = strExcluFilters.split(" ");

	if (strPresentFilters != null && strPresentFilters != "")
		PresentFilters = strPresentFilters.split(" ");

	FilterItems();

	if (!bIsIE)
		FilterReviews();
	else // IE requires "threaded filtering" to avoid a long page load delay
	{
		nReviewGroupIndex = -1;
		nReviewIndex = -1;
		if (!bFilteringInProgress) // If already filtering setTimeout automatically calls
		{
			bFilteringInProgress = true;
			//divFilterMsg.style.display = "";
			FilterReviews();
		}
	}
	
	if (strExcluFilters != null)
		InititalizeControls(strExcluFilters, strPresentFilters);
}

// This goes in the .htm itself when generic
function InititalizeControls(strExcluFilters, strPresentFilters)
{
	document.getElementById("StandaloneFltTbl").checked = (strPresentFilters.indexOf("f_fSA") != -1);
	document.forms[0].InlineStandFilter[(strPresentFilters.indexOf("f_fSA") != -1) ? 0 : 1].checked = true;	

	document.getElementById("USBFltTbl").checked = (strPresentFilters.indexOf("f_fUSB") != -1);
	document.forms[0].InlineUSBFilter[(strPresentFilters.indexOf("f_fUSB") != -1) ? 0 : 1].checked = true;	

	document.getElementById("DJFltTbl").checked = (strPresentFilters.indexOf("f_fDJ") != -1);
	document.forms[0].InlineDJFilter[(strPresentFilters.indexOf("f_fDJ") != -1) ? 0 : 1].checked = true;	

	document.getElementById("SPDIFFltTbl").checked = (strPresentFilters.indexOf("f_fSPDIF") != -1);
	document.forms[0].InlineSPDIFFilter[(strPresentFilters.indexOf("f_fSPDIF") != -1) ? 0 : 1].checked = true;	

	document.getElementById("AnaFltTbl").checked = (strPresentFilters.indexOf("f_fANA") != -1);
	document.forms[0].InlineAnalogFilter[(strPresentFilters.indexOf("f_fANA") != -1) ? 0 : 1].checked = true;	

	document.getElementById("MMFltTbl").checked = (strExcluFilters.indexOf("f_fMM") != -1);
	document.forms[0].InlineMMFilter[(strExcluFilters.indexOf("f_fMM") != -1) ? 0 : 1].checked = true;	

	document.getElementById("ASFltTbl").checked = (strExcluFilters.indexOf("f_fAS") != -1);
	document.forms[0].InlineASFilter[(strExcluFilters.indexOf("f_fAS") != -1) ? 0 : 1].checked = true;	

}

function FilterReviews()
{
	//strFilters = strFilters + " f_fSticky";
	if (ReviewGroups == null)
		InitializeReviewList();

	if (!bIsIE)
	{
		for (var i = 0; i < ReviewGroups.length; i++)
		{
			CurrentRevGroup = ReviewGroups[i];
			FilterReviewGroup();
			ResizeTasks();
			EqualLinkAndBodyHeight(true);
		}
	}
	else
	{
		nReviewGroupIndex++;
		if (nReviewGroupIndex < ReviewGroups.length)
		{
			//divFilterMsg.innerHTML = "Filtering: " + (ReviewGroups.length - nReviewGroupIndex);
			bContainsProducts = false;
			CurrentRevGroup = ReviewGroups[nReviewGroupIndex];
			nReviewIndex = -1;

			FilterReviewGroup();
			//setTimeout("FilterReviews()", 250);
		}
		else
		{
			bFilteringInProgress = false;
			document.title = "USB Turntable Comparison";
			ResizeTasks();
			EqualLinkAndBodyHeight(true);
			//divFilterMsg.style.display = "none";
		}
	}
}


function FilterReviewGroup()
{
	if (!bIsIE)
	{
		for (var j = 0; j < CurrentRevGroup.reviews.length; j++)
		{
			bContainsProducts = false;
			if (FilterReview(j))
				bContainsProducts = true;
		}
	}
	else
	{
		nReviewIndex++;
		if (nReviewIndex < CurrentRevGroup.reviews.length)
		{
			//divFilterMsg.innerHTML
			document.title = "USB Turntable Comparison   (Filtering: " + (ReviewGroups.length - nReviewGroupIndex) + ")";
			if (FilterReview(nReviewIndex))
				bContainsProducts = true;
			
			setTimeout("FilterReviewGroup()", 100);
			return;
		}
	}

	if (bContainsProducts)
	{
		if (CurrentRevGroup.style.display != "")
			CurrentRevGroup.style.display = "";

		if (CurrentRevGroup.reviews.length > 1)
			EvenBoxes(CurrentRevGroup.reviews);
		else if (bIsIE)
			setTimeout("FilterReviews()",  250);
	}
	else
	{
		if (CurrentRevGroup.style.display != "none")
			CurrentRevGroup.style.display = "none";

		if (bIsIE)
			setTimeout("FilterReviews()",  250);
	}
}

function FilterReview(j)
{
	var Rev = CurrentRevGroup.reviews[j].Container;
	var bMatchedAll = false;
	var strRevFilters = Rev.getAttribute("filter_items");
	
	if (strRevFilters == "")
		return true;

	if (strRevFilters.indexOf("f_fSticky") == -1)
	{
		for (var k = 0; k < ExcluFilters.length; k++)
		{
			var FilterItem = ExcluFilters[k];
			
			if (FilterItem.indexOf("f_c") != -1 && bWorldOverride)
			{
				bMatchedAll = true;
				continue;
			}

			if (strRevFilters.indexOf(FilterItem) == -1)
			{
				if (Rev.style.display != "none")
					Rev.style.display = "none";
				bMatchedAll = false;
				break;
			}
			else
				bMatchedAll = true;
		}
		
		if (bMatchedAll)
		{
			var bMatchedOne = false;
			for (var k = 0; k < PresentFilters.length; k++)
			{
				if (strRevFilters.indexOf(PresentFilters[k]) != -1)
				{
					if (Rev.style.display != "")
						Rev.style.display = "";
					bMatchedOne = true;
					break;
				}
			}
			
			if (!bMatchedOne && Rev.style.display != "none")
				Rev.style.display = "none";

			return bMatchedOne;
		}
		else
			return false;
	}
	else
		return true;
	
}

function EvenBoxes(BoxList)
{
	nMaxHeight = 0, nMaxImgHeight = 0, nMaxBodHeight = 0, nMaxFootHeight = 0, nBoxIndex = 0;
	var funcGetProdBoxImgSize = GetProdBoxImgSize;
	
	for (var i = 0; i < BoxList.length; i++)
	{
		var ProdBox = BoxList[i];
		/*var ProdBod = document.getElementById(ProdBox.id + "Bod");
		
		if (ProdBox == null || ProdBod == null)
			break;
		*/
		if (ProdBox.Container.style.display == "none")
			continue;

		var nImgHeight = funcGetProdBoxImgSize(ProdBox.Container, ProdBox.ProdImg);
		if (ProdBox.Container.offsetHeight > nMaxHeight)
			nMaxHeight = ProdBox.Container.offsetHeight;
			
		if (nImgHeight > nMaxImgHeight)
			nMaxImgHeight = nImgHeight;
		
		if (ProdBox.ProdBod.offsetHeight > nMaxBodHeight)
			nMaxBodHeight = ProdBox.ProdBod.offsetHeight;
			
		if (ProdBox.ProdFoot.offsetHeight > nMaxFootHeight)
			nMaxFootHeight = ProdBox.ProdFoot.offsetHeight;
	}

	if (nMaxHeight > 0)
	{
		nMaxBodHeight = nMaxBodHeight - 18;
		nMaxFootHeight = nMaxFootHeight - 18;

		if (!bIsIE)
		{
			for (var i = 0; i < BoxList.length; i++)
				EvenBox(BoxList[i]);
		}
		else
			setTimeout("EvenBox(null)", 250);
	}	
}

function EvenBox(ProdBox)
{
	if (ProdBox == null)
		ProdBox = CurrentRevGroup.reviews[nBoxIndex];

	var ImageContainer = ProdBox.ProdImage;
	if (ProdBox == null || ImageContainer == null)
		return;

	if (ProdBox.Container.style.display == "none")
		return;

	var ProdFoot = ProdBox.ProdFoot;
	var nImgSize = GetProdBoxImgSize(ProdBox.Container, ProdBox.ProdImg);

	var nAddHeight = parseInt((nMaxImgHeight - nImgSize) / 2);
	var nTopMargin = nAddHeight;

	if (nTopMargin + nAddHeight < nMaxImgHeight - nImgSize)
		nAddHeight++;

	if (ImageContainer.style.height != (nAddHeight + nImgSize) + "px")
		ImageContainer.style.height = (nAddHeight + nImgSize) + "px";

	if (ImageContainer.style.marginTop != nTopMargin + "px")
		ImageContainer.style.marginTop = nTopMargin + "px";

	if (ProdBox.ProdBod.style.height = nMaxBodHeight + "px")
		ProdBox.ProdBod.style.height = nMaxBodHeight + "px";

	if (ProdBox.ProdFoot.style.height != nMaxFootHeight + "px")
		ProdBox.ProdFoot.style.height = nMaxFootHeight + "px";
		
	if (bIsIE)
	{
		nBoxIndex++;
		if (nBoxIndex < CurrentRevGroup.reviews.length)
			setTimeout("EvenBox(null)", 300);
		else
			setTimeout("FilterReviews()",  100);
	}
}
function GetProdBoxImgSize(ProdBox, ProdImg)
{
	var strInner = ProdBox.innerHTML.toLowerCase();
	var nHeightEnds = strInner.indexOf('height=') + 7;
	if (!bIsIE)
		nHeightEnds++;

	var strQuoOrSpc = (!bIsIE) ? '"' : ' ';
	return parseInt(strInner.substring(nHeightEnds, strInner.indexOf(strQuoOrSpc, nHeightEnds + 1)));
//	else
//	{
//		var ImageElement = ProdBox.firstChild;

//		while (ImageElement != null && ImageElement.tagName != "img" && ImageElement.tagName != "IMG")
//			ImageElement = ImageElement.firstChild;
//			
//		return ImageElement.offsetHeight;
//	}		
}

function InitializeReviewList()
{
	ReviewGroups = [];
	var alldivs = document.getElementsByTagName('div');

	for (var j = 0; j < alldivs.length; j++)
	{
		// Get Product Group (null for all- use for rotator)
		// Make even
		var node = alldivs[j];
		if (node.id != null && node.id.indexOf("review_cnt_") != -1)
		{
			var bNextGroupFound = false;
			node.reviews = new Array();
			
			j++;
			var reviewNode = alldivs[j];
			for (; !bNextGroupFound && reviewNode != null; j++)
			{
				// Found a product box
				if (reviewNode.getAttribute("product_makemodel") != null)
				{
					var Review = new Object();
					// Build the review object
					Review.Container = reviewNode;
					j++;
					
					for (; j < alldivs.length && alldivs[j].getAttribute("product_makemodel") == null; j++)
					{
						if (alldivs[j].id == null || alldivs[j].id == "")
							continue;

						if (alldivs[j].id.indexOf("review_cnt_") != -1)
							break;

						if (alldivs[j].id.indexOf("ProdBoxImg") != -1)
							Review.ProdImage = alldivs[j];
						else if (alldivs[j].id.indexOf("ProdBoxBod") != -1)
							Review.ProdBod = alldivs[j];
						else if (alldivs[j].id.indexOf("ProdBoxFoot") != -1)
							Review.ProdFoot = alldivs[j];
					}

					node.reviews.push(Review);
				}
				else
					j++;

				reviewNode = alldivs[j];
				if (reviewNode != null)
				{
					// Found the next group
					if (reviewNode.id != null && reviewNode.id.indexOf("review_cnt_") != -1)
						bNextGroupFound = true;
				}
				
				// Prodbox loop will increment
				j--;
			}

			ReviewGroups.push(node);
			
			// Outer loop will increment
			j = j - 2;
		}
	}
}

function NodeClick(Row)
{
	var Body = Row.parentNode;
	var i = (Row.sectionRowIndex + 1);

	if (Row.cells.item(0).style.backgroundImage == "url(/ico/Node-Expand.gif)")
		Row.cells.item(0).style.backgroundImage = "url(/ico/Node-Contract.gif)";
	else
		Row.cells.item(0).style.backgroundImage = "url(/ico/Node-Expand.gif)";
	
	for (;i < Body.rows.length; i++)
	{
		//alert(Body.rows.item(i).align);
		if (Body.rows.item(i).className.indexOf("cmpr_clpse_hdr") == -1)
		{
			if (Body.rows.item(i).style.display == "")
				Body.rows.item(i).style.display = "none";
			else
				Body.rows.item(i).style.display = "";
		}
		else 
			break;
	}
}

function FilterItems()
{
	/*
		Go backwards through table
		
		Clear ContainsItems flag
		If an item is visible, set ContainsItems flag
		When category header is reached, set visibility to ContainsItems
	
	*/
	
	//alert("Filter: Class = " + Class);

	var alltables = document.getElementsByTagName('table');

	for (var j = 0; j < alltables.length; j++)
	{
		if (alltables[j].className.search(/\bsortable\b/) != -1)
		{
			var Body = alltables[j].tBodies[0];
			var bContainsItems = false;
			
			for (var i = Body.rows.length - 1; i >= 0; i--)
			{
				// Handle header rows
				if (Body.rows.item(i).className.indexOf("cmpr_clpse_hdr") != -1)
				{
					//alert("Row, ContainsItems = " + bContainsItems);
					if (bContainsItems && bSortManu)
						Body.rows.item(i).style.display = "";
					else
						Body.rows.item(i).style.display = "none";
					
					bContainsItems = false;
					continue;
				}
				
				// Handle regular rows
				//alert("Filtering by " + Class + "\r\nThis Row: " + Body.rows.item(i).className);
				var bMatchedAll = true;
				for (var k = 0; k < ExcluFilters.length; k++)
				{
					var FilterItem = ExcluFilters[k];
					
					if (FilterItem == "f_fSticky")
						continue;

					if (FilterItem.indexOf("f_c") != -1 && bWorldOverride)
						continue;

					if (Body.rows.item(i).className.indexOf(FilterItem) == -1)
					{
						Body.rows.item(i).style.display = "none";
						bMatchedAll = false;
						break;
					}
				}

				if (bMatchedAll)
				{
					var bMatchedOne = false;
					for (var k = 0; k < PresentFilters.length; k++)
					{
						if (Body.rows.item(i).className.indexOf(PresentFilters[k]) != -1)
						{
							Body.rows.item(i).style.display = "";
							bMatchedOne = bContainsItems = true;
							break;
						}
					}
					
					if (!bMatchedOne)
						Body.rows.item(i).style.display = "none";					
				}
			}
		}
	}
}

function UpdateCompareTblCategories(Body, bShow)
{
	bSortManu = bShow;
	
	for (var i=0;i < Body.rows.length; i++)
	{
		//alert(Body.rows.item(i).align);
		if (Body.rows.item(i).className.indexOf("cmpr_clpse_hdr") != -1)
		{
			UpdateCompareTblCategoryLabels(Body, i, !bShow);
			
			if (bShow)
			{
				FilterItems();
				if (Body.rows.item(i).style.display != "")
					Body.rows.item(i).style.display = "";
			}
			else if (Body.rows.item(i).style.display != "none")
			{
				Body.rows.item(i).style.display = "none";
			}
		}
	}
				
	if (!bShow)
		bCatAdded = true;

}

// Add or remove one or more filters separated by spaces.
function ModifyPresentFilters(strFilters, bAdd)
{
	var ModifyFilters = strFilters.split(" ");
//	alert(strFilters + " " + AllFilters.length);
	for (var i = 0; i < ModifyFilters.length; i++)
	{
		var bFoundIt = false;

		for (var k = 0; k < PresentFilters.length; k++)
		{
			if (ModifyFilters[i] == PresentFilters[k])
			{
				if (bAdd)
					bFoundIt = true;
				else
					PresentFilters.splice(k,1);
			}
		}

		if (bAdd && !bFoundIt)
			PresentFilters.push(ModifyFilters[i]);
	}

	AddCookie("LP2CDPresentFilters", BuildFilterString(PresentFilters), null, "/");

	setTimeout("FilterAll()", 4000);
//	alert(PresentFilters.length);
}

// Add or remove one or more filters separated by spaces.
function ModifyExcluFilters(strFilters, bAdd)
{
	var ModifyFilters = strFilters.split(" ");
	
//	alert(strFilters + " " + ExcluFilters.length);
	for (var i = 0; i < ModifyFilters.length; i++)
	{
		var bFoundIt = false;

		for (var k = 0; k < ExcluFilters.length; k++)
		{
			if (ModifyFilters[i] == ExcluFilters[k])
			{
				if (bAdd)
					bFoundIt = true;
				else
					ExcluFilters.splice(k,1);
			}
		}

		if (bAdd && !bFoundIt)
			ExcluFilters.push(ModifyFilters[i]);
	}
	
	AddCookie("LP2CDExclFilters", BuildFilterString(ExcluFilters), null, "/");
	
	setTimeout("FilterAll()", 3000);
//	alert(ExcluFilters.length);
}

function BuildFilterString(FilterArray)
{
	var FilterString = "";

	for (var k = 0; k < FilterArray.length; k++)
	{
		if (FilterArray[k] != null && FilterArray[k] != "" && FilterArray[k].indexOf("f_c") == -1)
		{
			if (FilterString.length > 0)
				FilterString = FilterString + " " + FilterArray[k];
			else
				FilterString = FilterArray[k];
		}
	}
	
	return FilterString;
}

function UpdateCompareTblCategoryLabels(Body, i, bAdd)
{
	var strCatText = Body.rows.item(i).cells.item(0).innerHTML + " ";
	//alert(strCatText);

	if (bAdd && bCatAdded)
		return;

	for (i++;i < Body.rows.length; i++)
	{
		if (Body.rows.item(i).className.indexOf("cmpr_clpse_hdr") == -1)
		{
			var TextElement = Body.rows.item(i).cells.item(0);
			var strPreText = "", strPostText = "", strItemText;
			var nPreTextIndex = TextElement.innerHTML.indexOf(">"),
				nPostTextIndex = TextElement.innerHTML.indexOf("</");

			if (nPreTextIndex != -1)
			{
				//alert(nPreTextIndex + "\t" + nPostTextIndex);
				strItemText = TextElement.innerHTML.substring(nPreTextIndex + 1, nPostTextIndex);
				strPreText = TextElement.innerHTML.substring(0, nPreTextIndex + 1);
				strPostText = TextElement.innerHTML.substring(nPostTextIndex, nPostTextIndex + 4);
			}
			else
				strItemText = TextElement.innerHTML;

			//alert("HTML:\t" + TextElement.innerHTML + "\nPre:\t" + strPreText + "\nCat:\t" + strCatText + "\nItem:\t" + strItemText + "\nPost:\t" + strPostText);

			if (bAdd)
				TextElement.innerHTML = strPreText + strCatText + strItemText + strPostText;
			else
			{
				bCatAdded = false;
				if (nPreTextIndex == -1)
					TextElement.innerHTML = 
						TextElement.innerHTML.substring(TextElement.innerHTML.indexOf(strCatText) + strCatText.length - 1);
				else
					TextElement.innerHTML = 
						strPreText + 
						TextElement.innerHTML.substring(nPreTextIndex + strCatText.length, nPostTextIndex) +
						strPostText;
			}
		}
		else 
			break;
	}
}

  sorttable = {
  init: function() {
    // quit if this function has already been called
    if (arguments.callee.done) return;
    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;
    // kill the timer
    if (_timer) clearInterval(_timer);
    
    if (!document.createElement || !document.getElementsByTagName) return;
    
    sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;
    
    forEach(document.getElementsByTagName('table'), function(table) {
      if (table.className.search(/\bsortable\b/) != -1) {
        sorttable.makeSortable(table);
      }
    });
    
  },
  
  makeSortable: function(table) {

    if (table.getElementsByTagName('thead').length == 0) {
      // table doesn't have a tHead. Since it should have, create one and
      // put the first table row in it.
      the = document.createElement('thead');
      the.appendChild(table.rows[0]);
      table.insertBefore(the,table.firstChild);
    }
    // Safari doesn't support table.tHead, sigh
    if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0];
    
    if (table.tHead.rows.length != 1) return; // can't cope with two header rows
    
    // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as
    // "total" rows, for example). This is B&R, since what you're supposed
    // to do is put them in a tfoot. So, if there are sortbottom rows,
    // for backwards compatibility, move them to tfoot (creating it if needed).
    sortbottomrows = [];
    for (var i=0; i<table.rows.length; i++) {
      if (table.rows[i].className.search(/\bsortbottom\b/) != -1) {
        sortbottomrows[sortbottomrows.length] = table.rows[i];
      }
    }
    if (sortbottomrows) {
      if (table.tFoot == null) {
        // table doesn't have a tfoot. Create one.
        tfo = document.createElement('tfoot');
        table.appendChild(tfo);
      }
      for (var i=0; i<sortbottomrows.length; i++) {
        tfo.appendChild(sortbottomrows[i]);
      }
      delete sortbottomrows;
    }
    
    // work through each column and calculate its type
    headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++) {
      // manually override the type with a sorttable_type attribute
      if (!headrow[i].className.match(/\bsorttable_nosort\b/)) { // skip this col
        mtch = headrow[i].className.match(/\bsorttable_([a-z0-9]+)\b/);
        if (mtch) { override = mtch[1]; }
	      if (mtch && typeof sorttable["sort_"+override] == 'function') {
	        headrow[i].sorttable_sortfunction = sorttable["sort_"+override];
	      } else {
	        headrow[i].sorttable_sortfunction = sorttable.guessType(table,i);
	      }
	      // make it clickable to sort
	      headrow[i].sorttable_columnindex = i;
	      headrow[i].sorttable_tbody = table.tBodies[0];
	      dean_addEvent(headrow[i],"click", function(e) {

		if (this.cellIndex == 0 && bSortManu)
			return;
			
	      if (this.cellIndex != 0)
			UpdateCompareTblCategories(this.sorttable_tbody, false);
          
          if (this.className.search(/\bsorttable_sorted\b/) != -1) {
            // if we're already sorted by this column, just 
            // reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted',
                                                    'sorttable_sorted_reverse');
            this.removeChild(document.getElementById('sorttable_sortfwdind'));
            sortrevind = document.createElement('span');
            sortrevind.id = "sorttable_sortrevind";
            sortrevind.innerHTML = stIsIE ? '&nbsp<font face="webdings">5</font>' : '&nbsp;&#x25B4;';
            this.appendChild(sortrevind);
            if (this.cellIndex == 0)
				UpdateCompareTblCategories(this.sorttable_tbody, true);
            return;
          }
          if (this.className.search(/\bsorttable_sorted_reverse\b/) != -1) {
            // if we're already sorted by this column in reverse, just 
            // re-reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted_reverse',
                                                    'sorttable_sorted');
            this.removeChild(document.getElementById('sorttable_sortrevind'));
            sortfwdind = document.createElement('span');
            sortfwdind.id = "sorttable_sortfwdind";
            sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
            this.appendChild(sortfwdind);
            //if (this.cellIndex == 0)
			//	UpdateCompareTblCategories(this.sorttable_tbody, true);
            return;
          }
          
          // remove sorttable_sorted classes
          theadrow = this.parentNode;
          forEach(theadrow.childNodes, function(cell) {
            if (cell.nodeType == 1) { // an element
              cell.className = cell.className.replace('sorttable_sorted_reverse','');
              cell.className = cell.className.replace('sorttable_sorted','');
            }
          });
          sortfwdind = document.getElementById('sorttable_sortfwdind');
          if (sortfwdind) { sortfwdind.parentNode.removeChild(sortfwdind); }
          sortrevind = document.getElementById('sorttable_sortrevind');
          if (sortrevind) { sortrevind.parentNode.removeChild(sortrevind); }
          
          this.className += ' sorttable_sorted';
          sortfwdind = document.createElement('span');
          sortfwdind.id = "sorttable_sortfwdind";
          sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
          this.appendChild(sortfwdind);

	        // build an array to sort. This is a Schwartzian transform thing,
	        // i.e., we "decorate" each row with the actual sort key,
	        // sort based on the sort keys, and then put the rows back in order
	        // which is a lot faster because you only do getInnerText once per row
	        row_array = [];
	        col = this.sorttable_columnindex;
	        rows = this.sorttable_tbody.rows;
	        for (var j=0; j<rows.length; j++) {
	          row_array[row_array.length] = [sorttable.getInnerText(rows[j].cells[col]), rows[j]];
	        }
	        /* If you want a stable sort, uncomment the following line */
	        //sorttable.shaker_sort(row_array, this.sorttable_sortfunction);
	        /* and comment out this one */
	        row_array.sort(this.sorttable_sortfunction);
	        
	        tb = this.sorttable_tbody;
	        for (var j=0; j<row_array.length; j++) {
	          tb.appendChild(row_array[j][1]);
	        }
	        
	        delete row_array;
            if (this.cellIndex == 0)
				UpdateCompareTblCategories(this.sorttable_tbody, true);
	      });
	    }
    }
  },
  
  guessType: function(table, column) {
    // guess the type of a column based on its first non-blank row
    sortfn = sorttable.sort_alpha;
    for (var i=0; i<table.tBodies[0].rows.length; i++) {
      text = sorttable.getInnerText(table.tBodies[0].rows[i].cells[column]);
      if (text != null && text != '') {
        if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
          return sorttable.sort_numeric;
        }
        // check for a date: dd/mm/yyyy or dd/mm/yy 
        // can have / or . or - as separator
        // can be mm/dd as well
        possdate = text.match(sorttable.DATE_RE)
        if (possdate) {
          // looks like a date
          first = parseInt(possdate[1]);
          second = parseInt(possdate[2]);
          if (first > 12) {
            // definitely dd/mm
            return sorttable.sort_ddmm;
          } else if (second > 12) {
            return sorttable.sort_mmdd;
          } else {
            // looks like a date, but we can't tell which, so assume
            // that it's dd/mm (English imperialism!) and keep looking
            sortfn = sorttable.sort_ddmm;
          }
        }
      }
    }
    return sortfn;
  },
  
  getInnerText: function(node) {
    // gets the text we want to use for sorting for a cell.
    // strips leading and trailing whitespace.
    // this is *not* a generic getInnerText function; it's special to sorttable.
    // for example, you can override the cell text with a customkey attribute.
    // it also gets .value for <input> fields.
    
    
    if (node == null)
		return;

    hasInputs = (typeof node.getElementsByTagName == 'function') &&
                 node.getElementsByTagName('input').length;
    
    if (node.getAttribute("sorttable_customkey") != null) {
      return node.getAttribute("sorttable_customkey");
    }
    else if (typeof node.textContent != 'undefined' && !hasInputs) {
      return node.textContent.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.innerText != 'undefined' && !hasInputs) {
      return node.innerText.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.text != 'undefined' && !hasInputs) {
      return node.text.replace(/^\s+|\s+$/g, '');
    }
    else {
      switch (node.nodeType) {
        case 3:
          if (node.nodeName.toLowerCase() == 'input') {
            return node.value.replace(/^\s+|\s+$/g, '');
          }
        case 4:
          return node.nodeValue.replace(/^\s+|\s+$/g, '');
          break;
        case 1:
        case 11:
          var innerText = '';
          for (var i = 0; i < node.childNodes.length; i++) {
            innerText += sorttable.getInnerText(node.childNodes[i]);
          }
          return innerText.replace(/^\s+|\s+$/g, '');
          break;
        default:
          return '';
      }
    }
  },
  
  reverse: function(tbody) {
    // reverse the rows in a tbody
    newrows = [];
    for (var i=0; i<tbody.rows.length; i++) {
      newrows[newrows.length] = tbody.rows[i];
    }
    for (var i=newrows.length-1; i>=0; i--) {
       tbody.appendChild(newrows[i]);
    }
    delete newrows;
  },
  
  /* sort functions
     each sort function takes two parameters, a and b
     you are comparing a[0] and b[0] */
  sort_numeric: function(a,b) {
    if (a[0] == null) a[0] = "0";
    aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
    if (isNaN(aa)) aa = 0;
    if (b[0] == null) b[0] = "0";
    bb = parseFloat(b[0].replace(/[^0-9.-]/g,'')); 
    if (isNaN(bb)) bb = 0;
    return aa-bb;
  },
  sort_alpha: function(a,b) {
    if (a[0]==b[0]) return 0;
    if (a[0]<b[0]) return -1;
    return 1;
  },
  sort_ddmm: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  sort_mmdd: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  
  shaker_sort: function(list, comp_func) {
    // A stable sort function to allow multi-level sorting of data
    // see: http://en.wikipedia.org/wiki/Cocktail_sort
    // thanks to Joseph Nahmias
    var b = 0;
    var t = list.length - 1;
    var swap = true;

    while(swap) {
        swap = false;
        for(var i = b; i < t; ++i) {
            if ( comp_func(list[i], list[i+1]) > 0 ) {
                var q = list[i]; list[i] = list[i+1]; list[i+1] = q;
                swap = true;
            }
        } // for
        t--;

        if (!swap) break;

        for(var i = t; i > b; --i) {
            if ( comp_func(list[i], list[i-1]) < 0 ) {
                var q = list[i]; list[i] = list[i-1]; list[i-1] = q;
                swap = true;
            }
        } // for
        b++;

    } // while(swap)
  }  
}

/* ******************************************************************
   Supporting functions: bundled here to avoid depending on a library
   ****************************************************************** */

// Dean Edwards/Matthias Miller/John Resig

/* for Mozilla/Opera9 */
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", sorttable.init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
    document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
    var script = document.getElementById("__ie_onload");
    script.onreadystatechange = function() {
        if (this.readyState == "complete") {
            sorttable.init(); // call the onload handler
        }
    };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
    var _timer = setInterval(function() {
        if (/loaded|complete/.test(document.readyState)) {
            sorttable.init(); // call the onload handler
        }
    }, 10);
}

/* for other browsers */
window.onload = sorttable.init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel, Matthias Miller, Diego Perini

// http://dean.edwards.name/weblog/2005/10/add-event/

function dean_addEvent(element, type, handler) {
	if (element.addEventListener) {
		element.addEventListener(type, handler, false);
	} else {
		// assign each event handler a unique ID
		if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
		// create a hash table of event types for the element
		if (!element.events) element.events = {};
		// create a hash table of event handlers for each element/event pair
		var handlers = element.events[type];
		if (!handlers) {
			handlers = element.events[type] = {};
			// store the existing event handler (if there is one)
			if (element["on" + type]) {
				handlers[0] = element["on" + type];
			}
		}
		// store the event handler in the hash table
		handlers[handler.$$guid] = handler;
		// assign a global event handler to do all the work
		element["on" + type] = handleEvent;
	}
};
// a counter used to create unique IDs
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(type, handler, false);
	} else {
		// delete the event handler from the hash table
		if (element.events && element.events[type]) {
			delete element.events[type][handler.$$guid];
		}
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
  this.cancelBubble = true;
}

// Dean's forEach: http://dean.edwards.name/base/forEach.js
/*
	forEach, version 1.0
	Copyright 2006, Dean Edwards
	License: http://www.opensource.org/licenses/mit-license.php
*/

// array-like enumeration
if (!Array.forEach) { // mozilla already supports this
	Array.forEach = function(array, block, context) {
		for (var i = 0; i < array.length; i++) {
			block.call(context, array[i], i, array);
		}
	};
}

// generic enumeration
Function.prototype.forEach = function(object, block, context) {
	for (var key in object) {
		if (typeof this.prototype[key] == "undefined") {
			block.call(context, object[key], key, object);
		}
	}
};

// character enumeration
String.forEach = function(string, block, context) {
	Array.forEach(string.split(""), function(chr, index) {
		block.call(context, chr, index, string);
	});
};

// globally resolve forEach enumeration
var forEach = function(object, block, context) {
	if (object) {
		var resolve = Object; // default
		if (object instanceof Function) {
			// functions have a "length" property
			resolve = Function;
		} else if (object.forEach instanceof Function) {
			// the object implements a custom forEach method so use that
			object.forEach(block, context);
			return;
		} else if (typeof object == "string") {
			// the object is a string
			resolve = String;
		} else if (typeof object.length == "number") {
			// the object is array-like
			resolve = Array;
		}
		resolve.forEach(object, block, context);
	}
};