function initPopups(){
	var _div = document.getElementsByTagName('div');
	for( var i =0; i<_div.length; i++){
		if(_div[i].className.indexOf("popup-holder") !=-1){
			_div[i].onmouseover = function(){
				this.className += " popup-hover";
			}
			_div[i].onmouseout = function(){
				this.className = this.className.replace(" popup-hover", "");
			}
		}
	}
}
if (window.attachEvent)
	window.attachEvent("onload", initPopups);