window.onload = function() 
{
	var lists = document.getElementsByTagName("UL");
	for (var i = 0; i < lists.length; i++) 
	{
		// ma seznam id popdownu
		if (lists[i].className == "popdown") {
			for (var j = 0; j < lists[i].children.length; j++) 
			{
				// najzed mysi docnitr
				lists[i].children[j].onmouseover = function()
				{
					this.className = "expanded";
				}
				// vyjez mysi ven
				lists[i].children[j].onmouseout = function()
				{
					this.className = "collapsed";
				}
			}
			
		}
	}
}