function hover()
{
	if(document.getElementById("nav"))
	{
		var sfEls = document.getElementById("nav").getElementsByTagName("li");
		for (var i=0; i<sfEls.length; i++)
		{
			sfEls[i].onmouseover = function()
			{
				this.className += " over";
			}
			sfEls[i].onmouseout = function()
			{
				this.className = this.className.replace(new RegExp(" over\\b"), "");
			}
		}
	}
}