/*
 * domTab.js
 * version 2.2
 * written by Chris Heilmann
 * more info: http://www.onlinetools.org/tools/domtab.php
*/

// Global variables
var currentTab,currentLink;

// Change if you want to use another class for highlighting
var tabHighlightClass='tabon';

function initTabs()
{
// change if you have another main navigation ids for tabbed or normal element id
	var navElement='mainnav';
	/* var navElementTabbedId='mainnavtabbed'; */

// pattern to check against to identify "back to menu" links
	var backToMenu=/#top/;

	var n,as,id,i,cid,linklength,lastlink,re;
	if(document.getElementById && document.createTextNode)
	{
		cid=window.location.toString().match(/#(\w.+)/);
		if (cid && cid[1])
		{
			cid=cid[1];
		}
		var n=document.getElementById(navElement);
		/* n.id=navElementTabbedId;
		n=document.getElementById(navElementTabbedId) */
		if ( n != null )
		{
			var as=n.getElementsByTagName('a');
			for (i=0;i<as.length;i++)
			{
				as[i].onclick=function(){showTab(this);return false}
				//as[i].onkeypress=function(){showTab(this);return false}
				id=as[i].href.match(/#(\w.+)/)[1];
				if(!cid && i==0)
				{
					currentTab=id;
					currentLink=as[i];
				} else if(id==cid)
				{
					currentTab=id;
					currentLink=as[i];
				}
				if(document.getElementById(id))
				{
					linklength=document.getElementById(id).getElementsByTagName('a').length;
					if(linklength>0)
					{
						lastlink=document.getElementById(id).getElementsByTagName('a')[linklength-1]
						if(backToMenu.test(lastlink.href))
						{
							lastlink.parentNode.removeChild(lastlink);
						}
					}
					document.getElementById(id).style.display='none';
				}
				if(cid){window.location.hash='top';}

			}


			if(document.getElementById(currentTab))
			{
				document.getElementById(currentTab).style.display='block';
			}
			re=new RegExp('\\b'+tabHighlightClass+'\\b');
			if(!re.test(currentLink.className))
			{
				currentLink.className=currentLink.className+' '+tabHighlightClass
			}
		}
	}
}
function showTab(o)
{
	var id;
	if(currentTab)
	{
		if(document.getElementById(currentTab))
		{
			document.getElementById(currentTab).style.display='none';
		}
		currentLink.className=currentLink.className.replace(tabHighlightClass,'')
	}
	var id=o.href.match(/#(\w.+)/)[1];
	currentTab=id;
	currentLink=o;
	if(document.getElementById(id))
	{
		document.getElementById(id).style.display='block';
	}
	var re=new RegExp('\\b'+tabHighlightClass+'\\b');
	if(!re.test(o.className))
	{
		o.className=o.className+' '+tabHighlightClass
	}
}

// If you need to call other scripts onload, change this call
window.onload=initTabs;