function classChange() {
	for (i=0;i<document.getElementsByTagName("li").length; i++) {
		if (document.getElementsByTagName("li").item(i).className == "hidden"){
			document.getElementsByTagName("li").item(i).style.textIndent= "-9999px";
			document.getElementsByTagName("li").item(i).style.height= "0px";  
			document.getElementsByTagName("li").item(i).style.fontSize= "0px";             
		}
	}
}