/* changeOverClass */
function changeOverClass(elId, tagName, searchClass) {
	var el = document.getElementById(elId).getElementsByTagName(tagName);
	for (i=0; i<el.length; i++) {
		if (el[i].className == searchClass || el[i].className == searchClass + " on") {
			el[i].onmouseover = changeOverClassOver;
			el[i].onmouseout = changeOverClassOut;
		}
	}
}
function changeOverClassOver() {
	if (this.className == "") {
		this.className = this.className + " on";
	} else {
		this.className = "on";
	}
}
function changeOverClassOut() {
	if (this.className == "on") {
		this.className = "";
	} else {
		this.className = this.className.replace(" on", "");
	}
}


/* util*/

function layer_hiddenshow(id){
		var f = document.getElementById(id).style;
		if(f.display == "block"){
			f.display = "none";
		}else{
			f.display = "block";
		}
		
	}
	function Host(){
		 var Dns;
		 Dns=location.href;
		 Dns=Dns.split("//");
		 Dns="http://"+Dns[1].substr(0,Dns[1].indexOf("/"));
		 return Dns;
	}