function ContentCheck()
{
var name=document.getElementById ("ctl00_ContentPlaceHolder1_tbName").value;
var mail=document.getElementById ("ctl00_ContentPlaceHolder1_tbEmail").value;
var ques=document.getElementById ("ctl00_ContentPlaceHolder1_dlQues").value;
var ans=document.getElementById ("ctl00_ContentPlaceHolder1_tbAns").value;
var vali=document.getElementById ("ctl00_ContentPlaceHolder1_tbVal").value;

if(cisempty(name))
alert("请输入用户名。");
else if(cisempty(mail))
alert("请输入注册时用的邮箱。");
else if(!cemail(mail))
alert("输入的邮箱格式不对。");
else if(cisempty(ques))
alert("请输入注册时的密码找回问题。");
else if(cisempty(ans))
alert("请输入密码找回问题答案。");
else if(cisempty(vali))
alert("请输入验证码。");
else
return true;
return false;
}