/*
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 = "/webcatalog/images/new/";
var image_up = "arrowup.gif";
var image_down = "arrowdown.gif";
var image_none = "arrownone.gif";
var europeandate = true;
var alternate_row_colors = true;

/* 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 = '<a href="#" class="sortheader" onclick="ts_resortTable(this, '
					+ i
					+ ');return false;">'
					+ txt
					+ '<span class="sortarrow">&nbsp;&nbsp;<img src="'
					+ image_path + image_none + '" alt="&darr;"/></span></a>';
		}
	}
	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 = '&nbsp;&nbsp;<img src="' + image_path + image_down
				+ '" alt="&darr;"/>';
		newRows.reverse();
		span.setAttribute('sortdir', 'up');
	} else {
		ARROW = '&nbsp;&nbsp;<img src="' + image_path + 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 = '&nbsp;&nbsp;<img src="' + image_path
						+ image_none + '" alt="&darr;"/>';
			}
		}
	}
	span.innerHTML = ARROW;
	alternate(t);
}

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(ts_getInnerText(a.cells[SORT_COLUMN_INDEX]));
	dt2 = sort_date(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), "");
	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) {
				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";
					}
				}
			}
		}
	}
}