startList = function() {
	if (document.all && document.getElementById) {
		var menuRoot = document.getElementById("Menu");
		for (var i = 0; i < menuRoot.childNodes.length; i++) {
			var node = menuRoot.childNodes[i];
				if (node.nodeName == "LI") {
					node.onmouseover = function() {
						this.className += " over";
					}
					node.onmouseout = function() {
						this.className = this.className.replace(" over", "");
					}
				}
			}
		}
	}
window.onload = startList;
function check_form(){ 
	var compare="!@#$%^&*()";
	var belong=false;
	var email=form_r.email.value;
	var pwd=form_r.password.value;
	var pwd2=form_r.password2.value;
	if(!email||!pwd){
		alert("username or password is empty");
		return false;
	}
	else if(!check_email(email)){
		alert("email address error");
		return false;
	}
	else if(pwd != pwd2){
		alert("Inconsistent password enter");
		return false;
	}
	else{
		return true;
	}
} 

function check_email(email_address){
if (email_address.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
	return true;
else
	return false;
}