function checkForm(name,email,errorlab)
{
    var nameobj = document.getElementById(name);
    var emailobj=document.getElementById(email);
    var errorlabobj = document.getElementById(errorlab);
   
    if(emailobj.value=="")
    {
        errorlabobj.innerHTML="请填写E-mail！";
        return false;
    }
     
    if(nameobj.value=="")
    {
        errorlabobj.innerHTML="请填写姓名！";
        return false;
    }
    
     var ValidEmail = new RegExp("^[a-zA-Z0-9][a-zA-Z0-9_.-]+\\@[a-zA-Z0-9\\-\\._]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");


   if (!ValidEmail.test(emailobj.value)) 
   {
	    errorlabobj.innerHTML = "邮箱格式不正确！";
	    return false;
	}

    return true;
}