function subs(){
var mail = document.getElementById("mail").value;
var re = /^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;
if(mail == ''){
alert("Email不能为空。");
return false;
}else if(!re.test(mail)){
alert("Email格式错误。");...
