addEvent(window, "load", sortables_init); 
var SORT_COLUMN_INDEX;

function sortables_init() {
	
    // Find all tables with class sortable and make them sortable
    if (!document.getElementsByTagName){
	 
	return;
	}
    tbls = document.getElementsByTagName("table");

    for (ti=0;ti<tbls.length;ti++) {
        thisTbl = tbls[ti];

        if (((' '+thisTbl.className+' ').indexOf("sortable") != -1)) {
            //initTable(thisTbl.id);
            ts_makeSortable(thisTbl);
        }
    }
    alternateRowColors();
}

function sortables_initByDocument(documentin) {
	
    // Find all tables with class sortable and make them sortable
    if (!documentin.getElementsByTagName){
	 
	return;
	}
    tbls = documentin.getElementsByTagName("table");

    for (ti=0;ti<tbls.length;ti++) {
        thisTbl = tbls[ti];

        if (((' '+thisTbl.className+' ').indexOf("sortable") != -1)) {
            //initTable(thisTbl.id);

            ts_makeSortable(thisTbl);
        }
    }
    alternateRowColorsByDocument(documentin);
}

function ts_makeSortable(table) {
    if (table.rows && table.rows.length > 0) {
        var firstRow = table.rows[0];
    }
    if (!firstRow) return;
  
    // We have a first row: assume it's the header, and make its contents clickable links
    for (var i=0;i<firstRow.cells.length;i++) {
        var cell = firstRow.cells[i];
        var txt = ts_getInnerText(cell);
       // alert("making first row header");
        cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow">&nbsp;&nbsp;&nbsp;</span></a>';
    }
	
}

function ts_getInnerText(el) {
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.innerText) return el.innerText;	//Not needed but it is faster
	var str = "";
	
	var cs = el.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++) {
		switch (cs[i].nodeType) {
			case 1: //ELEMENT_NODE
				str += ts_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
	return str;
}

function IsNumeric(sText)
{
   var ValidChars = "0123456789.,";
   var IsNumber=true;
   var Char;
 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
        IsNumber = false;
   }
   return IsNumber;
}

function ts_resortTable(lnk) {
	
    var td = lnk.parentNode;
    var column = td.cellIndex;
    var table = getParent(td,'TABLE');
	var itm;
	var spantext = ts_getInnerText(span);

    // get the span
    var span;
    for (var ci=0;ci<lnk.childNodes.length;ci++) {
        if (lnk.childNodes[ci].tagName && lnk.childNodes[ci].tagName.toLowerCase() == 'span') span = lnk.childNodes[ci];
    }
    
    
    // Work out a type for the column
    if (table.rows.length <= 1) return;
    itm = "*";
    var c=1;
    while (itm == "*" && c < table.rows.length){
      itm = ts_getInnerText(table.rows[c].cells[column]);
      c++;
    }
    sortfn = ts_sort_caseinsensitive;
    //if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
    //if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
    if (itm.indexOf("/") != -1){
      firstMatch = itm.indexOf("/");
      secondMatch = itm.lastIndexOf("/");
      if (firstMatch != secondMatch)
        sortfn = ts_sort_date;  
      //alert(firstMatch + ", " + secondMatch);
    }
    else if (itm.indexOf("$") != -1){
      sortfn = ts_sort_currency;
    }
    else if (IsNumeric(itm)){
      sortfn = ts_sort_numeric;
    }
    //if (itm.match(/^[£$]/)) sortfn = ts_sort_currency;
    //if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric;
    //alert("Sortfn: " + sortfn + "itm:" + itm);
    //sortfn = ts_sort_date;
    SORT_COLUMN_INDEX = column;
    var firstRow = new Array();
    var newRows = new Array();
    for (i=0;i<table.rows[0].length;i++) { 
      firstRow[i] = table.rows[0][i]; 
      
      }
    for (j=1;j<table.rows.length;j++) { 
      newRows[j-1] = table.rows[j]; 
      
      }

    newRows.sort(sortfn);

    if (span.getAttribute("sortdir") == 'down') {
        ARROW = '&nbsp;&nbsp;&uarr;';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    } else {
        ARROW = '&nbsp;&nbsp;&darr;';
        span.setAttribute('sortdir','down');
    }
    
    // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
    // don't do sortbottom rows
    for (i=0;i<newRows.length;i++) { if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))) table.tBodies[0].appendChild(newRows[i]);}
    // do sortbottom rows only
    for (i=0;i<newRows.length;i++) { if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1)) table.tBodies[0].appendChild(newRows[i]);}
    
    // Delete any other arrows there may be showing
    var allspans = document.getElementsByTagName("span");
    for (var ci=0;ci<allspans.length;ci++) {
        if (allspans[ci].className == 'sortarrow') {
            if (getParent(allspans[ci],"table") == getParent(lnk,"table")) { // in the same table as us?
                allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
            }
        }
    }
        
    span.innerHTML = ARROW;
    
    try {
    alternateTableColors(table);
    } catch (e){}
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
		return el;
	else
		return getParent(el.parentNode, pTagName);
}

function fixDateTo10Char(date){
  var month = date.substring(0, date.indexOf('/'));
  if (month.length < 2)
      month = "0" + month;
  date = date.slice(date.indexOf('/') + 1);

  var day = date.substring(0, date.indexOf('/'));
  if (day.length < 2)
      day = "0" + day;
  date = date.slice(date.indexOf('/') + 1);

  var year = date;

  date = month + "/" + day + "/" + year;

  return date;
}

function ts_sort_date(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa.length < 6)
      dt1 = "0";
    else {
      aa = fixDateTo10Char(aa);
      if (aa.length == 10) 
        dt1 = aa.substr(6,4)+aa.substr(0,2)+aa.substr(3,2);
    }
    if (bb.length < 6)
      dt2 = "0";
    else {
      bb = fixDateTo10Char(bb);
      if (bb.length == 10) 
        dt2 = bb.substr(6,4)+bb.substr(0,2)+bb.substr(3,2);
    }
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
}

function ts_sort_currency(a,b) { 
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
    return parseFloat(aa) - parseFloat(bb);
}

function removeCommas(strNum){
  strNum = strNum.replace(",","");
  return strNum;
}

function ts_sort_numeric(a,b) { 
    valueA = removeCommas(ts_getInnerText(a.cells[SORT_COLUMN_INDEX]));
    aa = parseFloat(valueA);
    if (isNaN(aa)) aa = 0;
    valueB = removeCommas(ts_getInnerText(b.cells[SORT_COLUMN_INDEX]));
    bb = parseFloat(valueB); 
    if (isNaN(bb)) bb = 0;
    return aa-bb;
}

function ts_sort_caseinsensitive(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).toLowerCase();
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}

function ts_sort_default(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}


function addEvent(elm, evType, fn, useCapture)
{
  if (elm.addEventListener){
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if (elm.attachEvent){
    var r = elm.attachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be removed");
  }
} 

function alternateRowColors() {
	var className = 'sortable';
	var rowcolor = '#DEDEBE';
	var rowcolordefault = '#fff';
	var rows, arow;
	var tables = document.getElementsByTagName("table");
	var rowCount = 0;
	for(var i=0;i<tables.length;i++) {
		//dump(tables.item(i).className + " " + tables.item(i).nodeName + "\n");
		if(tables.item(i).className == className) {
			
			atable = tables.item(i);
			rows = atable.getElementsByTagName("tr");
			for(var j=0;j<rows.length;j++) {
				arow = rows.item(j);
				if(arow.nodeName == "TR" || arow.nodeName == "tr") {
					if(rowCount % 2) {
						arow.style.backgroundColor = rowcolor;
					} else {
						arow.style.backgroundColor = rowcolordefault;
					}
					rowCount++;
				}
			}
			rowCount = 0;
		}
	}
}

function alternateTableColors(atable) {
	var className = 'sortable';
	var rowcolor = '#DEDEBE';
	var rowcolordefault = '#fff';
	var rows, arow;
	var rowCount = 0;
		//dump(tables.item(i).className + " " + tables.item(i).nodeName + "\n");
			rows = atable.getElementsByTagName("tr");
			for(var j=0;j<rows.length;j++) {
				arow = rows.item(j);
				if(arow.nodeName == "TR" || arow.nodeName == "tr") {
					if(rowCount % 2) {
						arow.style.backgroundColor = rowcolor;
					} else {
						arow.style.backgroundColor = rowcolordefault;
					}
					rowCount++;
				}
			}
} 

	


function alternateRowColorsByDocument(documentin) {
	var className = 'sortable';
	var rowcolor = '#DEDEBE';
	var rowcolordefault = '#fff';
	var rows, arow;
	var tables = documentin.getElementsByTagName("table");
	var rowCount = 0;
	for(var i=0;i<tables.length;i++) {
		//dump(tables.item(i).className + " " + tables.item(i).nodeName + "\n");
		if(tables.item(i).className == className) {
			atable = tables.item(i);
			rows = atable.getElementsByTagName("tr");
			for(var j=0;j<rows.length;j++) {
				arow = rows.item(j);
				if(arow.nodeName == "TR" || arow.nodeName == "tr") {
					if(rowCount % 2) {
						arow.style.backgroundColor = rowcolor;
					} else {
						arow.style.backgroundColor = rowcolordefault;
					}
					rowCount++;
				}
			}
			rowCount = 0;
		}
	}
}