/*
Adapted from the code at http://www.kryogenix.org/code/browser/sorttable/
- The table tag needs to have a class="sortable"
- The table tag needs to have a unique id="someval" attribute
-
- All updates by: Communication Freedom, LLC
- http://www.communicationfreedom.com
-
- Changes:
- Unknown		Mark Jacobsen 	Implemented sorttableInit(n) to allow for sorting of tables w/ more than 1 header row
- Unknown		Mark Jacobsen 	Implemented sorttableInit2(n,n) to allow for sorting of tables w/ header and footer rows
- 12/23/2006 	Mark Jacobsen 	Sort descending by default (since we usually want to see more recent/greater things first
- 12/27/2006 	Mark Jacobsen 	Made it so headers w/ a control (ex: checkbox) aren't clickable
- 12/27/2006 	Mark Jacobsen 	Sort descending by default for non-strings, sort ascending by default for strings
- 01/02/2007 	Mark Jacobsen 	Added (itm.match(/^\d{1,3}[(,\d{3})*][\.\d{2}]/)) to recognize values with commas are numbers
- 01/02/2007 	Mark Jacobsen 	Added .replace(/,/g,"") to ts_sort_numeric to remove commas so values can be sorted correctly
*/

//addEvent(window, "load", sortables_init);

var SORT_COLUMN_INDEX;
var HEADER_ROW_INDEX;
var END_ROWS_TO_SKIP;

/*
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 sorttableInit(headerRowIndex)
{
    sorttableInit2(headerRowIndex, 0);
}

function sorttableInit2(headerRowIndex, endRowsToSkip)
{
    // Find all tables with class sortable and make them sortable
    HEADER_ROW_INDEX = headerRowIndex;
    END_ROWS_TO_SKIP = endRowsToSkip;
    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 > HEADER_ROW_INDEX) {
        var headerRow = table.rows[HEADER_ROW_INDEX];
    }
    if (!headerRow) return;
    
    // We have a header row: make its contents clickable links
    for (var i = 0; i < headerRow.cells.length; i++) {
        var cell = headerRow.cells[i];
        var txt = ts_getInnerText(cell);
        if(txt.length > 0) // Added so we don't try to make controls clickable 12/27/2006 - Mark Jacobsen
        {
	        cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow"></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 ts_resortTable(lnk) {
    // 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 td = lnk.parentNode;
    var column = td.cellIndex;
    var table = getParent(td,'TABLE');
    var l_sDataType = "str";
    
    if (table.rows.length <= HEADER_ROW_INDEX + 1) return; // Less than 1 row of data, it's already sorted
    
    // Work out a type for the column
    var itm = ts_getInnerText(table.rows[HEADER_ROW_INDEX + 1].cells[column]);
    sortfn = ts_sort_caseinsensitive;
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/))
    {
    	sortfn = ts_sort_date;
    	l_sDataType = "date";
    }
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/))
    {
    	sortfn = ts_sort_date;
    	l_sDataType = "date";
    }
    if (itm.match(/^[£$]/)) 
    {
    	sortfn = ts_sort_currency;
    	l_sDataType = "money";
    }
    if ( (itm.match(/^\d{1,3}[(,\d{3})*][\.\d{2}]/)) || (itm.match(/^[\d\.]+$/)) )
    {
    	sortfn = ts_sort_numeric;
    	l_sDataType = "number";
    }
    SORT_COLUMN_INDEX = column;
    
    var newRows = new Array();
    var endRows = new Array();
    for (j = HEADER_ROW_INDEX + 1; j < table.rows.length - END_ROWS_TO_SKIP; j++)
    {
    	newRows[j - (HEADER_ROW_INDEX + 1)] = table.rows[j];
    }
    for (j = table.rows.length - END_ROWS_TO_SKIP; j < table.rows.length; j++)
    {
    	endRows[endRows.length] = table.rows[j];
    }

    newRows.sort(sortfn);

	if (l_sDataType == "str")
	{
		if (span.getAttribute("sortdir") == 'down') {
	        newRows.reverse();
	        span.setAttribute('sortdir', 'up');
	    } else {
	        span.setAttribute('sortdir', 'down');
	    }
	}
	else
	{
		if (span.getAttribute("sortdir") == 'up') {
			span.setAttribute('sortdir', 'down');
	    } else {
	        newRows.reverse();
	        span.setAttribute('sortdir', 'up');
	    }
    }    
    
    // 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]);
    	}
    }
    
    if (END_ROWS_TO_SKIP > 0)
    {
	    for (i = 0; i < endRows.length; i++)
	    {
	    	if (!endRows[i].className || (endRows[i].className && (endRows[i].className.indexOf('sortbottom') == -1))) 
	    	{
	    		table.tBodies[0].appendChild(endRows[i]);
	    	}
	    }
    }
}

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) * 366) + (aa.substr(0,2) * 12) + 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);
    }
    if (bb.length == 10) {
        dt2 = (bb.substr(6,4) * 366) + (bb.substr(0,2) * 12) + 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);
    }
    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]).replace(/,/g,""));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/,/g,"")); 
    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)
// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
  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");
  }
}