function $(id,tagName)
{
	return document.getElementById(id).getElementsByTagName(tagName);
}
function setTab(index)
{
	var navItems = $("tabNav","li");
	var tab = $("tabContent","ul");
	for(var i=0;i<navItems.length;i++)
	{
		navItems[i].className=i==index?"hover":"";
		tab[i].style.display=i==index?"block":"none";
	}
}
function setHeight()
{
    var nav = document.getElementById("tabNav").offsetHeight; 
    var content = document.getElementById("tabContent").offsetHeight;
    if(nav < content)
    {
        document.getElementById("tabNav").style.height = (content-2) +"px";
    }
}
function selectItem()
{
    var itemID = window.location.search;
    var index = parseInt(itemID.substring(3));
    setTab(index);
}