var currentTab,currentLink;
var tabHighlightClass='tabon'; 
function initTabs()
{
var navElement='mainnav1';
var navElementTabbedId='mainnavtabbed1';
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)
var as=n.getElementsByTagName('a');
for (i=0;i<as.length;i++)
{
as[i].onclick=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
}
}
window.onload=initTabs;