//Set tab to intially be selected when page loads:
//[which tab (1=first tab), ID of tab content to display (or "" if no corresponding tab content)]:
var initialtab=[1, "todaytab"];
var previoustab="";

function expandsitenavigation(cid, aobject){
if (document.getElementById){
highlighttab(aobject)
if (previoustab!="")
document.getElementById(previoustab).style.display="none"
if (cid!=""){
document.getElementById(cid).style.display="block"
previoustab=cid
}
}
}


function highlighttab(aobject){
if (typeof tabobjlinks=="undefined")
collectnavigationtabs()
for (i=0; i<tabobjlinks.length; i++)
tabobjlinks[i].className=""
aobject.className="current"
}


function collectnavigationtabs(){
var tabobj=document.getElementById("navtabs")
tabobjlinks=tabobj.getElementsByTagName("a")
}


function do_onload(){
collectnavigationtabs();
expandsitenavigation(initialtab[1], tabobjlinks[initialtab[0]-1] );
}

if (window.addEventListener)
window.addEventListener("load", do_onload, false)
else if (window.attachEvent)
window.attachEvent("onload", do_onload)
else if (document.getElementById)
window.onload=do_onload