/*****************************************************************
*   ELITE ZEBRA TABLES (v.2.1)
*   http://www.eklekt.com/widgets/zebras/index.php
*
*	This javascript will allow html tables to be sorted, striped, selected, and submitted.
*	See website for details and usage.
*
*	Original table sorting script from http://www.kryogenix.org/code/browser/sorttable/
*	Distributed under the MIT license: http://www.kryogenix.org/code/browser/licence.html
*
*	Original table striping script from http://www.alistapart.com/articles/zebratables/
*	Modified by Jop de Klein at http://validweb.nl/artikelen/javascript/better-zebra-tables/
*
*
*	Copyright (c) 1997-2006 Stuart Langridge, David F. Miller, Jop de Klein, Jesse Fulton.
*
*	All scripts added to and modified by Jesse Fulton, 6/17/2006
*
*	Free for use.  Please leave full license intact.
******************************************************************/



/**
* Cross-browser event handling for IE5+,  NS6 and Mozilla
* By Scott Andrew
*
*/
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");
  }
} 

/**
* Gets nearest parent (grandparent, etc.) with tagname pTagName
*/
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);
}



/**
* BEGIN TABLE SORTING FUNCTIONALITY
*/

var SORT_COLUMN_INDEX;

/**
* Goes through all document tables and calls ts_makeSortable
* on any table with a class of "sortable".
*/
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);
		}
	}
}

/**
* Adds events and styles to handle sorting behavior.
*/
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];
		if (cell.className.indexOf("sortable") < 0) {
			continue;
		}
		var txt = cell.innerHTML;
		cell.innerHTML = '<a href="#" class="sortheader" '+ 
		'onclick="ts_resortTable(this, '+i+');stripe();return false;">' + 
		txt+'<span class="sortarrow">&nbsp;&nbsp;&nbsp;</span></a>';
	}
}

/**
* Returns the inner text of an element.
*/
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 trim(str);
}


/**
* Calls a sort function a table column for each table body.
*/
function ts_resortTable(lnk,clid) {
	// 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.rows.length <= 1) return;
	var itm = ts_getInnerText(table.rows[1].cells[column]);
	sortfn = ts_sort_caseinsensitive;

	//ts_sort_date currently only handles these two formats
	if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
	else if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
	
	else if (itm.match(/^[£$]/)) sortfn = ts_sort_currency;
	else if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric;
	else if (itm.match(/^(-)?[\d\.]+$/)) sortfn = ts_sort_numeric;
	else if (itm.match(/^(-)?(\d{1,3}\,)*(\d{1,3})+\.?\d*$/)) sortfn = ts_sort_numeric;		

	
	SORT_COLUMN_INDEX = column;
	
	
	var tbodies = table.getElementsByTagName("tbody");
	for (var h = 0; h < tbodies.length; h++) {
		var tableBody = tbodies[h];
		var newRows = new Array();
		
	
		var trs = tableBody.getElementsByTagName("tr");

		for (var i = 0; i < trs.length; i++) {
			newRows[i] = trs[i]; 
		}
		newRows.sort(sortfn);


		if (span.getAttribute("sortdir") == 'down') {
			newRows.reverse();
		}
		
		// We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
		// don't do sortbottom rows
		for (var i=0;i<newRows.length;i++) { 
			if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))) {
				tableBody.appendChild(newRows[i]);
			}
		}
	
		// do sortbottom rows only
		for (var i=0;i<newRows.length;i++) { 
			if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1)) { 
				tableBody.appendChild(newRows[i]);
			}
		}


	}


	if (span.getAttribute("sortdir") == 'down') {
		ARROW = '&nbsp;&nbsp;&uarr;';
		span.setAttribute('sortdir','up');
	} else {
		ARROW = '&nbsp;&nbsp;&darr;';
		span.setAttribute('sortdir','down');
	}
	
	// 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;
}


/**
* Sorts strings as dates.
*/
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);
	} 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)+bb.substr(3,2)+bb.substr(0,2);
	} 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;
}

/**
* Sorts strings as an amount of currency.
*/
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);
}

/**
* Sorts strings numerically.
*/
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;
}

/**
* Sorts strings case insensitively.
*/
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;
}

/**
* Sorts strings by the default sort behavior.
*/
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;
}



/**
* BEGIN ZEBRA STRIPING AND SELECTION/SUBMISSION CODE
*/


/**
* Performs a "zebra striping" of all tables with the class name of "striped".
*/
var stripe = function() {
	var tables = document.getElementsByTagName("table");	

	for(var x=0;x!=tables.length;x++){
		var table = tables[x];
		if (! table) { return; }
		
		if (table.className.indexOf("striped") < 0) {
			continue;
		}
		
		var tbodies = table.getElementsByTagName("tbody");
		var even = true;
		for (var h = 0; h < tbodies.length; h++) {
			
			var trs = tbodies[h].getElementsByTagName("tr");
					
			
			for (var i = 0; i < trs.length; i++) {
				if(even) {
					if (trs[i].className.indexOf("even") < 0) {
						trs[i].className += " even";
					}
				}
				else {
					trs[i].className = trs[i].className.replace("even", "");
				}
				
				even = !even;
			}
		}
	}
}


/**
* Gets all rows within the table body of a table with class name "selectable"
* and allows them to be selected.  They highlight on mouseover and are selected on click.
*
* Since these rows are selectable, the function also tries to make the table
* submittable.
* SEE: makeTableSubmittable(table);
*/
var makeSelectable = function() {
	var tables = document.getElementsByTagName("table");	



	for(var x=0;x!=tables.length;x++){
		var table = tables[x];
		if (! table) { return; }

		hideElements(table.getElementsByTagName("td"));			

		if (table.className.indexOf("selectable") < 0) {
			continue;
		}
		
		var tbodies = table.getElementsByTagName("tbody");
		
		for (var h = 0; h < tbodies.length; h++) {

			var trs = tbodies[h].getElementsByTagName("tr");
			
			for (var i = 0; i < trs.length; i++) {
				if (trs[i].className.indexOf("disabled") >= 0) {
					//disableChildCheckBoxes(this);
					continue;
				}
			
						
				if(isChecked(trs[i])) {
					if (trs[i].className.indexOf("selected") < 0) {
						trs[i].className += " selected";
					}
				}
			
				trs[i].onmouseover=function(){
					this.className += " ruled"; return false
				}
				trs[i].onmouseout=function(){
					this.className = this.className.replace("ruled", ""); return false
				}

				trs[i].onclick=function(){
					if (this.className.indexOf("selected") < 0) {
						this.className += " selected";
						checkChildCheckboxes(this, true);
						return true;	
					}
					else {
						this.className = this.className.replace("selected", ""); 
						checkChildCheckboxes(this, false);
						return true;
					}
				}					

			}
		}

		makeTableSubmittable(table);

	}
}



/**
* Takes a list of elements and an optional input type (for 'input' elements)
* and sets their display to none.  If the inputType parameter is set, then it
* will check to make sure that the type matches.
*/
var hideElements = function(els, inputType) {
	for (var i=0; i<els.length; i++) {
		var isRightType = true;
		if (inputType != 'undefined' && els[i].type != inputType) {
			isRightType = false;
		}
		if (isRightType && els[i].className.indexOf("hideme") >= 0) {
			els[i].style.display = 'none';
		}
	}
}


/**
* Searches the element passed in (a tr in our case) for any child input elements 
* which are checkboxes.  If it finds one that is checked, it returns true.
*/
var isChecked = function(el) {
	var inpts = el.getElementsByTagName("input");
	for (var n=0; n<inpts.length; n++) {
		if (inpts[n].getAttribute("type") == "checkbox") {
			return (inpts[n].checked);
		}
	}
	return false;
}


/**
* Gets all checkboxes which are a child of the element passed in and sets
* their "checked" value to the parameter chk.
*/
var checkChildCheckboxes = function(el, chk) {
	var inpts = el.getElementsByTagName("input");
	for (var n=0; n<inpts.length; n++) {
		if (inpts[n].getAttribute("type") == "checkbox") {
			inpts[n].checked = chk;
		}
	}
}


/**
* Gets forms within the table passed in.
* Makes any button with a class of "select_all" highlight all rows.
* Makes any button with a class of "select_none" unhighlight all rows.
*
* SEE: selectAllRows(table, highlight);
*/
var makeTableSubmittable = function(table) {

	var inputs = table.getElementsByTagName("input");
	for (var h = 0; h < inputs.length; h++) {
		if (inputs[h].type == "button") {
			if (inputs[h].className.indexOf("select_all") >= 0) {
				inputs[h].onclick = function() {selectAllRows(table, true);}
			}
			if (inputs[h].className.indexOf("select_none") >= 0) {
				inputs[h].onclick = function() {selectAllRows(table, false);}
			}				
		}
	}
}



/**
* Will select or deselect all of the rows in the table specified.
*
*/
var selectAllRows = function(table, highlight) { 

		if (! table) { return; }
		
		if (table.className.indexOf("striped") < 0) {
			return;
		}
		
		var tbodies = table.getElementsByTagName("tbody");
		
		for (var h = 0; h < tbodies.length; h++) {
			var trs = tbodies[h].getElementsByTagName("tr");
				for (var i = 0; i < trs.length; i++) {
				
					if (trs[i].className.indexOf("disabled") >= 0) {
						continue;
					}

					if (highlight) {
							if (trs[i].className.indexOf("selected") < 0) {
								trs[i].onclick();
							}
					}
					else {
							if (trs[i].className.indexOf("selected") >= 0) {
								trs[i].onclick();
							}
					}
				}
		}			
}

function trim(str) {
	return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
}




/*addEvent(window, "load", sortables_init);
addEvent(window, "load", stripe);
addEvent(window, "load", makeSelectable);*/

sortables_init();
stripe();
makeSelectable();