/*
Table sorting script  by Joost de Valk, check it out at http://www.joostdevalk.nl/code/sortable-table/.
Based on a script from http://www.kryogenix.org/code/browser/sorttable/.
Distributed under the MIT license: http://www.kryogenix.org/code/browser/licence.html .

Copyright (c) 1997-2007 Stuart Langridge, Joost de Valk.

Version 1.5.7
*/

/* You can change these values */
var image_path = "";
var image_up = "../images/arrows/asc.gif";
var image_down = "../images/arrows/desc.gif";
var image_none = "../images/arrows/arrownone.gif";
var europeandate = true;
var alternate_row_colors = false;

/* Don't change anything below this unless you know what you're doing */
addEvent(window, "load", sortables_init);

var SORT_COLUMN_INDEX;
var thead = false;

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)) 
		{
			ts_makeSortable(thisTbl);
		}
	}
}

function ts_makeSortable(t) 
{
	if (t.rows && t.rows.length > 0) 
	{
		if (t.tHead && t.tHead.rows.length > 0) 
		{
			var firstRow = t.tHead.rows[t.tHead.rows.length-1];
			thead = true;
		} 
		else 
		{
			var firstRow = t.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);
		if (cell.className != "unsortable" && cell.className.indexOf("unsortable") == -1) 
		{
			cell.innerHTML = '<div class="sortheader" onclick="ts_resortTable(this, '+i+');return false;"><b>'+txt+'</b><span style="width:1px;"class="sortarrow"></span></div>';
		}
	}
	if (alternate_row_colors) 
	{
		alternate(t);
	}
}

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, clid) 
{
	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 t = getParent(td,'TABLE');
	// Work out a type for the column
	if (t.rows.length <= 1) return;
	var itm = "";
	var i = 0;
	while (itm == "" && i < t.tBodies[0].rows.length) 
	{
		var itm = ts_getInnerText(t.tBodies[0].rows[i].cells[column]);
		itm = trim(itm);
		if (itm.substr(0,4) == "<!--" || itm.length == 0) 
		{
			itm = "";
		}
		i++;
	}
	if (itm == "") return; 
	
	sortfn = ts_sort_caseinsensitive;
	if (itm.match(/^\d\d[\/\.-][a-zA-z][a-zA-Z][a-zA-Z][\/\.-]\d\d\d\d$/)) sortfn = ts_sort_date;
	if (itm.match(/^\d\d[\/\.-]\d\d[\/\.-]\d\d\d{2}?$/)) sortfn = ts_sort_date;
	if (itm.match(/^-?[£$€Û¢´].*\d/)) sortfn = ts_sort_numeric;
	if (itm.match(/^-?(\d+[,\.]?)+(E[-+][\d]+)?%?$/)) sortfn = ts_sort_numeric;
	
	SORT_COLUMN_INDEX = column;
	
	var firstRow = new Array();
	var newRows = new Array();
	for (k=0;k<t.tBodies.length;k++) 
	{
		for (i=0;i<t.tBodies[k].rows[0].length;i++) 
		{ 
			firstRow[i] = t.tBodies[k].rows[0][i]; 
		}
	}
	for (k=0;k<t.tBodies.length;k++) 
	{
		if (!thead) 
		{
			// Skip the first row
			for (j=1;j<t.tBodies[k].rows.length;j++) 
			{ 
				newRows[j-1] = t.tBodies[k].rows[j];
			}
		} 
		else 
		{
			// Do NOT skip the first row
			for (j=0;j<t.tBodies[k].rows.length;j++) 
			{ 
				newRows[j] = t.tBodies[k].rows[j];
			}
		}
	}
	newRows.sort(sortfn);
	if (span.getAttribute("sortdir") == 'down') 
	{
			ARROW = '<img src="' + image_down + '" alt="&darr;"/>';
			newRows.reverse();
			span.setAttribute('sortdir','up');
	} 
	else 
	{
			ARROW = '<img src="' + image_up + '" alt="&uarr;"/>';
			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))) 
		{
			t.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)) 
			t.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 = '';
			}
		}
	}		
	span.innerHTML = ARROW;
	alternate(t);
	
	//sortOrders(lnk.firstChild.innerHTML, span.getAttribute("sortdir") == "up" ? "down" : "up");
}

function getParent(el, pTagName) 
{
	if (el == null) 
	{
		return null;
	} 
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) 
	{
		return el;
	} 
	else 
	{
		return getParent(el.parentNode, pTagName);
	}
}

function sort_date(date) 
{	
	// y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
	dt = "00000000";
	if (date.length == 11) 
	{
		mtstr = date.substr(3,3);
		mtstr = mtstr.toLowerCase();
		switch(mtstr) 
		{
			case "jan": var mt = "01"; break;
			case "feb": var mt = "02"; break;
			case "mar": var mt = "03"; break;
			case "apr": var mt = "04"; break;
			case "may": var mt = "05"; break;
			case "jun": var mt = "06"; break;
			case "jul": var mt = "07"; break;
			case "aug": var mt = "08"; break;
			case "sep": var mt = "09"; break;
			case "oct": var mt = "10"; break;
			case "nov": var mt = "11"; break;
			case "dec": var mt = "12"; break;
			// default: var mt = "00";
		}
		dt = date.substr(7,4)+mt+date.substr(0,2);
		return dt;
	} 
	else if (date.length == 10) 
	{
		if (europeandate == false) 
		{
			dt = date.substr(6,4)+date.substr(0,2)+date.substr(3,2);
			return dt;
		} 
		else 
		{
			dt = date.substr(6,4)+date.substr(3,2)+date.substr(0,2);
			return dt;
		}
	} 
	else if (date.length == 8) 
	{
		yr = date.substr(6,2);
		if (parseInt(yr) < 50) 
		{ 
			yr = '20'+yr; 
		} 
		else 
		{ 
			yr = '19'+yr; 
		}
		if (europeandate == true) 
		{
			dt = yr+date.substr(3,2)+date.substr(0,2);
			return dt;
		} 
		else 
		{
			dt = yr+date.substr(0,2)+date.substr(3,2);
			return dt;
		}
	}
	return dt;
}

function ts_sort_date(a,b) 
{
	dt1 = sort_date(trim(ts_getInnerText(a.cells[SORT_COLUMN_INDEX])));
	dt2 = sort_date(trim(ts_getInnerText(b.cells[SORT_COLUMN_INDEX])));
	
	if (dt1==dt2) 
	{
		return 0;
	}
	if (dt1<dt2) 
	{ 
		return -1;
	}
	return 1;
}
function ts_sort_numeric(a,b) 
{
	var aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
	aa = clean_num(aa);
	var bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
	bb = clean_num(bb);
	return compare_numeric(aa,bb);
}
function compare_numeric(a,b) 
{
	var a = parseFloat(a);
	a = (isNaN(a) ? 0 : a);
	var b = parseFloat(b);
	b = (isNaN(b) ? 0 : b);
	return a - b;
}
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");
	}
}

function clean_num(str) 
{
	str = str.replace(new RegExp(/[^-?0-9]/g),""); //[^-?0-9.]
	return str;
}

function trim(s) 
{
	return s.replace(/^\s+|\s+$/g, "");
}

function alternate(table) 
{
	// Take object table and get all it's tbodies.
	var tableBodies = table.getElementsByTagName("tbody");
	// Loop through these tbodies
	for (var i = 0; i < tableBodies.length; i++) 
	{
		// Take the tbody, and get all it's rows
		var tableRows = tableBodies[i].getElementsByTagName("tr");
		// Loop through these rows
		// Start at 1 because we want to leave the heading row untouched
		for (var j = 0; j < tableRows.length; j++) 
		{
			// Check if j is even, and apply classes for both possible results
			if ( (j % 2) == 0  && j > 0) 
			{
				if ( !(tableRows[j].className.indexOf('odd') == -1) ) 
				{
					tableRows[j].className = tableRows[j].className.replace('odd', 'even');
				} 
				else 
				{
					if ( tableRows[j].className.indexOf('even') == -1 ) 
					{
						tableRows[j].className += " even";
					}
				}
			} 
			else 
			{
				if ( !(tableRows[j].className.indexOf('even') == -1) ) 
				{
					tableRows[j].className = tableRows[j].className.replace('even', 'odd');
				} 
				else 
				{
					if ( tableRows[j].className.indexOf('odd') == -1 ) 
					{
						tableRows[j].className += " odd";
					}
				}
			} 
		}
	}
}