// Routines used to sort tables on the product pages. I snitched this code from the following site:
//  http://www.kryogenix.org/code/browser/sorttable/ 
// Instructions and description data can be found there.
// G. Betz 10-06
// I did make a couple of changes due to the fact that the product tables have an additional header row before the caption row. So I had 
// to modify the starting position pointers below, which I have commented appropriately and initialed with my name.


addEvent(window, "load", sortables_init);
var SORT_COLUMN_INDEX;

function alternate(id)
{ 
 	if(document.getElementsByTagName)
 	{  
		var table = document.getElementById(id);   
   		var rows = table.getElementsByTagName("tr");   
   		for(i = 0; i < rows.length; i++)
		{           
			//manipulate rows 
     		if(i % 2 == 0)
		  	{ 
				rows[i].className = "even"; 
     	  	}
			else	
			{ 
       			rows[i].className = "odd"; 
     	  	}       
   		} 
	} 
}


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);
			// alert ('ID=' + thisTbl.id + ', Class=' + thisTbl.className );
        }
    }
}

function ts_makeSortable(table) {
    if (table.rows && table.rows.length > 0) {
        // G. Betz -- Changed the following to alternate row as header row
		// var firstRow = table.rows[0]; // First row as header
		var firstRow = table.rows[1]; // Second row as header
		// var firstRow = table.rows[2]; // Third row as header

    }
    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);
        cell.innerHTML = '<a href="javascript:void()" class="sortheader" '+ 
        'onclick="ts_resortTable(this, '+i+'); return false;">' + 
        txt+'<span class="sortarrow"></span></a>';
		// G. Betz -- Changed the previous line, substituting <br>&#8212; for three non-breaking spaces
    }
}

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) {
    // 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;
    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]; }
    // G. Betz 10-4 -06  
	// changed the following line from....
	//  for (j=1;j<table.rows.length;j++) { newRows[j-1] = table.rows[j]; }
	// to ..........
	for (j=2;j<table.rows.length;j++) { newRows[j-2] = table.rows[j]; }
	// so that the first table row, which is an informational banner only,  can be excluded from the sort process

    newRows.sort(sortfn);

    if (span.getAttribute("sortdir") == 'down') {
		// G. Betz -- Changed two non-breaking space characters to a single <br>  --
        ARROW = '<br>&uarr;';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    } else {
		// G. Betz -- Changed two non-breaking space characters to a single <br>  --
        ARROW = '<br>&darr;';
        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))) 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]);}
    
    // 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?
		// G. Betz -- Changed three non-breaking space characters to NOTHING! (who needs more crap?) --
                // allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
				// allspans[ci].innerHTML = '<br>&#8212;';
				allspans[ci].innerHTML = '';
            }
        }
    }
        
    span.innerHTML = ARROW;
	// G. Betz -- Added the following line to re-alternate the the row colors after the sort.
	alternateTables();
}

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);
    } 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;
}

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)
// 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");
  }
} 

// Stuff for setting and toggling cookies
// G Betz 10-12-06


function SetCookie (name, value) {
  $.cookie(name, escape (value)); 
}

function GetCookie (name) {
var result= null;
var result = $.cookie(name);
// alert( $.cookie(name) );
return result;
}

function toggleCookieValue(name) {
var cookie = GetCookie(name);
if (cookie == 1)
  { SetCookie (name, "0"); }
else if (cookie == 0 || cookie == null) 
  { SetCookie (name, "1"); }
else
  { SetCookie (name, "0"); }
 return cookie;
 }

function closeTable(tid) {
var tableid = "#tab" + tid;
var theadid = "#tab" + tid + "head";
var tbodyid = "#tab" + tid + "body";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
SetCookie (tableid, "0");
// Expand table here
$(document).ready(function(){
 $(theadid).hide();
 $(tbodyid).hide();
  });
document.getElementById(expandidn).setAttribute('src','/images/expand1.gif');
// document.getElementById(listlink).setAttribute('title','Click to open tables');
}

function closeTables(tid) {
  for( var i =0; i <tid.length; i++) {
	closeTable( tid[i] );
  }
}


function showTable_OLD(tid) {
var tableid = "tab" + tid;
var tbodyid = "tab" + tid + "body";
var theadid = "tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
SetCookie (tableid, "1", null, null, null, null);
// Expand table here
document.getElementById(tbodyid).style.display = "";
document.getElementById(theadid).style.display = "";
document.getElementById(expandidn).setAttribute('src','/images/contract1.gif');
// document.getElementById(listlink).setAttribute('title','Click to close table');
}

function showTable(tid) {
var tableid = "#tab" + tid;
var tbodyid = "#tab" + tid + "body";
var theadid = "#tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
SetCookie (tableid, "1");
// Expand table here
$(document).ready(function(){
 $(theadid).show();
 $(tbodyid).show();
  });
document.getElementById(expandidn).setAttribute('src','/images/contract1.gif');
// document.getElementById(listlink).setAttribute('title','Click to close table');
}

function showTables(tid) {
  for( var i =0; i <tid.length; i++) {
	showTable( tid[i] );
  }
}

function initTableVisibility_OLD(tid) {
var tableid = "tab" + tid;
var tbodyid = "tab" + tid + "body";
var theadid = "tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
// First get the cookie for this table. If reset, then contract the table, else expand the table
var cookie = GetCookie(tableid);
// Initialize the cookie to zero if returned cookie is -1
if (cookie == -1){
SetCookie (tableid, "0");
cookie = 0;
}
// alert ('initTableVisibility: Returned cookie value = ' + cookie);
if (cookie == 1){
// Expand table here
document.getElementById(tbodyid).style.display = "";
document.getElementById(theadid).style.display = "";
document.getElementById(expandidn).setAttribute('src', '/images/contract1.gif');
document.getElementById(listlink).setAttribute('title','Click to close table');
//document.getElementById(tableid).style.border = "1px solid";
} else {
// Contract table here
document.getElementById(tbodyid).style.display = "none";
document.getElementById(theadid).style.display = "none";
document.getElementById(expandidn).setAttribute('src','/images/expand1.gif');
document.getElementById(listlink).setAttribute('title','Click to display products');
document.getElementById(tableid).style.border = "1px none";
}}

function initTableVisibility(tid) {
var tableid = "#tab" + tid;
var tbodyid = "#tab" + tid + "body";
var theadid = "#tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
// First get the cookie for this table. If reset, then contract the table, else expand the table
var cookie = GetCookie(tableid);
// Initialize the cookie to zero if returned cookie is -1
if (cookie == -1){
SetCookie (tableid, "0");
cookie = 0;
}
// alert ('initTableVisibility: Returned cookie value = ' + cookie);
if (cookie == 1){
// Expand table here
$(document).ready(function(){
 $(theadid).show();
 $(tbodyid).show();
  });
document.getElementById(expandidn).setAttribute('src', '/images/contract1.gif');
document.getElementById(listlink).setAttribute('title','Click to close table');
//document.getElementById(tableid).style.border = "1px solid";
} else {
// Contract table here
$(document).ready(function(){
 $(theadid).hide();
 $(tbodyid).hide();
  });
document.getElementById(expandidn).setAttribute('src','/images/expand1.gif');
document.getElementById(listlink).setAttribute('title','Click to display products');
//document.getElementById(tableid).style.border = "1px none";
}}


function initTablesVisibility(tid) {
  for( var i =0; i <tid.length; i++) {
	initTableVisibility( tid[i] );
  }
}

// This opens and closes the table based on the value of the cookie previously set.

function expandcontract(tid) {
var tableid = "#tab" + tid;
var tbodyid = "#tab" + tid + "body";
var theadid = "#tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
// First get the cookie for this table. If set, then contract the table, else expand the table
var cookie = toggleCookieValue(tableid);
// alert ('expandContract: Returned cookie value = ' + cookie);
if (cookie == 0 || cookie == -1 || cookie == null){
// Expand table here
$(document).ready(function(){
 $(theadid).show();
 $(tbodyid).show();
  });
document.getElementById(expandidn).setAttribute('src','/images/contract1.gif');
document.getElementById(listlink).setAttribute('title','Click to close table');
//document.getElementById(tableid).style.border = "1px solid";
} else {
// Contract table here
$(document).ready(function(){
 $(tbodyid).hide();
 $(theadid).hide();
  });
document.getElementById(expandidn).setAttribute('src', '/images/expand1.gif');
document.getElementById(listlink).setAttribute('title','Click to display products');
document.getElementById(tableid).style.border = "1px none";
}}

function expandcontract_OLD(tid) {
var tableid = "tab" + tid;
var tbodyid = "tab" + tid + "body";
var theadid = "tab" + tid + "head";
var expandidn = "expandid" + tid;
var listlink = "helpText" + tid;
// First get the cookie for this table. If set, then contract the table, else expand the table
var cookie = toggleCookieValue(tableid);
// alert ('expandContract: Returned cookie value = ' + cookie);
if (cookie == 0 || cookie == -1 || cookie == null){
// Expand table here
document.getElementById(tbodyid).style.display = "";
document.getElementById(theadid).style.display = "";
document.getElementById(expandidn).setAttribute('src','/images/contract1.gif');
document.getElementById(listlink).setAttribute('title','Click to close table');
} else {
// Contract table here
document.getElementById(tbodyid).style.display = "none";
document.getElementById(theadid).style.display = "none";
document.getElementById(expandidn).setAttribute('src', '/images/expand1.gif');
document.getElementById(listlink).setAttribute('title','Click to display products');
document.getElementById(tableid).style.border = "1px none";
}}


function DL_GetElementLeft(eElement)
{
    if (!eElement && this)                       // if argument is invalid
    {                                            // (not specified, is null or is 0)
        eElement = this;                         // and function is a method
    }                                            // identify the element as the method owner
    
    var nLeftPos = eElement.offsetLeft;          // initialize var to store calculations
    var eParElement = eElement.offsetParent;     // identify first offset parent element  
    while (eParElement != null)
    {                                            // move up through element hierarchy
        nLeftPos += eParElement.offsetLeft;      // appending left offset of each parent
        eParElement = eParElement.offsetParent;  // until no more offset parents exist
    }
    alert ('reference=' + eElement + ', left position=' + nLeftPos);
	return nLeftPos;                             // return the number calculated
	
}


function DL_GetElementTop(eElement)
{
    if (!eElement && this)
    {
        eElement = this;
    }

    var nTopPos = eElement.offsetTop;
    var eParElement = eElement.offsetParent;
    while (eParElement != null)
    {
        nTopPos += eParElement.offsetTop;
        eParElement = eParElement.offsetParent;
    }
    alert ('reference=' + eElement + ', top position=' + nTopPos);
    return nTopPos;
}

function DL_GetElementWidth(eElement)
{
    if (!eElement && this)
    {
        eElement = this;
    }

    var nWidth = eElement.offsetWidth;
    var eParElement = eElement.offsetParent;
    while (eParElement != null)
    {
        nWidth += eParElement.offsetWidth;
        eParElement = eParElement.offsetParent;
    }
    // alert ('reference=' + eElement + ', width=' + nWidth);
    return nWidth;
}



var DHTML = (document.getElementById || document.all || document.layers);
// alert ('DHTML=' + DHTML );

function getObj(name)
{
  if (document.getElementById)
  {
  	this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  else if (document.layers)
  {
   	this.obj = document.layers[name];
   	this.style = document.layers[name];
  }
}