//To use this, add class="sortable" to your table and a unique ID

addEvent(window, "load", sortables_init);

var SORT_COLUMN_INDEX;
var sortcolumnname = '';
var sortdirection = '';
var sortcolumnNum ;

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) && (thisTbl.id)) {
            //initTable(thisTbl.id);
            ts_makeSortable(thisTbl);
        }
    }
}

function ts_makeSortable(table) {
    if (table.rows && table.rows.length > 0) {
        var firstRow = table.rows[0];
    }
    if (!firstRow) return;
    //set the sort arrow when back button is hit.
    if (readCookie("sort") != null)
    {
		var sort = readCookie("sort");
		sort = sort.split(",");
		sortcolumnname = sort[0];
		sortdirection = sort[1];
		
    }
    // 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);
        if (txt == "List Date" && readCookie("sort") == null) 
        {
			cell.innerHTML = '<a id="' + txt + '" href="#" class="sortheader" '+ 
			'onclick="ts_resortTable(' + '\'' + txt + '\'' + ',this, '+i+');return false;">' + 
			txt+'<span class="sortheaderup">&nbsp;&nbsp;&nbsp;</span></a>';
			sortcolumnname = txt;
			sortdirection = 'up';
        }
        else
        {
			cell.innerHTML = '<a id="' + txt + '" href="#" class="sortheader" '+ 
			'onclick="ts_resortTable(' + '\'' + txt + '\'' + ',this, '+i+');return false;">' + 
			txt+'<span class="sortarrow">&nbsp;&nbsp;&nbsp;</span></a>';
			if (txt == sortcolumnname) sortcolumnNum = i;
		}
    }
    
}

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 ts_resortTable(txt,lnk,clid) {
   // DeleteRow();
   var tbl = document.getElementById('tbListings');
    for (var ti=0;ti<tbl.rows.length;ti++) 
	{
		var thisrow = tbl.rows[ti];
		if (thisrow.id == 'sRow')
		{
			//alert(ti)
			tbl.deleteRow(ti);
		}
    }
      
    if (lnk == null) //for the back button
    {
		var lnks = document.getElementsByTagName("a");
		 for (var li=0;li<lnks.length;li++) {
			thislnk = lnks[li];
			if (thislnk.id.indexOf(sortcolumnname) >= 0)
			{
				lnk = thislnk;
				break;
			}
		}
    }
    // 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];
    }
    var spantext = ts_getInnerText(span);
    var td = lnk.parentNode;
    var column = clid || td.cellIndex;
    var table = getParent(td,'TABLE');
    
    // Work out a type for the column
	if (table == null) 
	{
		//to handle office redirect (rows null error since no table)
		if (document.getElementById("List Date") != null)
		{
			document.getElementById("List Date").className = 'sortheaderup';
		}
		return;
	}
	else 
	{
		if (document.getElementById("List Date") != null) document.getElementById("List Date").className = '';
	}
	
    if (table.rows.length <= 1) return;
    var itm = ts_getInnerText(table.rows[1].cells[column]);
    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.match(/^[£$]/)) sortfn = ts_sort_currency;
    if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric;
    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 (readCookie("sort") != null) 
	{
		if (sortdirection == 'up') 	newRows.reverse();
		span.setAttribute('sortdir',sortdirection); //for the back button
	}
	else
	{
		if (span.getAttribute("sortdir") == 'down') {
			ARROW = '&nbsp;&nbsp;&uarr;';
			newRows.reverse();
			span.setAttribute('sortdir','up');
		// span.setAttribute('className','sortheaderup');
		} else {
			ARROW = '&nbsp;&nbsp;&darr;';
			span.setAttribute('sortdir','down');
		// span.setAttribute('className','sortheaderdown');
		}
	}
            
    // 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]);
		}
	}
	
	//AddRow(rowindex,listOfficeName,listingId,address, city, state, zip,price, isPruList, listAgentAgentId, officeId, mlsId, listAgentName)	
	//var thisrow;
	//var tds = document.getElementsByTagName("tr");
	//for (var ti=0;ti<tds.length;ti++) {
       // thisrow = tds[ti];
     for (var ti=0;ti<table.rows.length;ti++) 
	{
		var thisrow = table.rows[ti];
        if (thisrow.id == 'trRow')
        {
			if ($('cat').value == 'res' || $('cat').value == 'mob') thisrow.onmouseover = function() {AddRow(this.rowIndex, table.rows[this.rowIndex].cells[8].innerHTML);} 
			else if ($('cat').value == 'lnd' || $('cat').value == 'inc' ) thisrow.onmouseover = function() {AddRow(this.rowIndex, table.rows[this.rowIndex].cells[5].innerHTML);} 
			else if ($('cat').value == 'bus') thisrow.onmouseover = function() {AddRow(this.rowIndex, table.rows[this.rowIndex].cells[4].innerHTML);} 
			
			thisrow.onmouseout = function() {DeleteRow(this.rowIndex);}
		} 
	}
	
    // Delete any other arrows there may be showing
    var allspans = document.getElementsByTagName("span");
    for (var ci=0;ci<allspans.length;ci++) {
		//alert(allspans[ci].className.indexOf('sortheaderdown'));
        if ((allspans[ci].className.indexOf('sortheaderdown') == 0) || (allspans[ci].className.indexOf('sortheaderup') == 0)) {
            if (getParent(allspans[ci],"table") == getParent(lnk,"table")) { // in the same table as us?
                allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
                allspans[ci].setAttribute('className','');
            }
        }
    }
    //span.innerHTML = ARROW;
    if (span.getAttribute("sortdir") == 'down') {
         span.setAttribute('className','sortheaderdown');
         sortdirection = 'down';
    } else {
         span.setAttribute('className','sortheaderup');
         sortdirection = 'up';
    }
  	bRow = false;
  	sortcolumnname = txt;
  	
}

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 ts_sort_date(a,b) {
    // y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa.length == 10) {
        //dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
        dt1 = aa.substr(6,4)+aa.substr(0,2)+aa.substr(3,2);
    } else {
        yr = aa.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        //dt1 = yr+aa.substr(3,2)+aa.substr(0,2);
        dt1 = yr+aa.substr(0,2)+aa.substr(3,2);
    }
    if (bb.length == 10) {
        //dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
        dt2 = bb.substr(6,4)+bb.substr(0,2)+bb.substr(3,2);
    } else {
        yr = bb.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        //dt2 = yr+bb.substr(3,2)+bb.substr(0,2);
        dt2 = yr+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 ts_sort_numeric(a,b) { 
    aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX]));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX])); 
    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");
  }
}