jsHover = function() {
	    var hEls = document.getElementById("tip").getElementsByTagName("LI");
	    for (var i=0, len=hEls.length; i<len; i++) {
	      hEls[i].onmouseover=function() { this.className+=" jshover"; }
	      hEls[i].onmouseout=function() { this.className=this.className.replace(" jshover", ""); }
	    }
	  }
	  if (window.attachEvent && navigator.userAgent.indexOf("Opera")==-1) window.attachEvent("onload", jsHover);
	  
function PopUp(obj){
		var popup = document.getElementById(obj);
		var overlay = document.getElementById("overlay");
		overlay.style.display = "block";
		popup.style.display = "block";
		}
		
		function HidePopUp(obj){
			var popup = document.getElementById(obj);
			var overlay = document.getElementById("overlay");
			overlay.style.display = "none";
			popup.style.display = "none";
		}