//主函数
function   Verify()   
  {   
      if(!VerifyMiss("firstname","Title","company","email"))   
          return   false;   
        if(!VerifyEmail())         return   false; 
		
		document.theForm.submit();   
  }
//检查没个变量是否为空，空提示  
  function   VerifyMiss()   
  {   
  for(var   i=0;i<arguments.length;i++){   
  if(document.getElementById(arguments[i]).value==""){   
  alert("Your "+document.getElementById(arguments[i]).name+" is required!");			 
  return   false;   
  }   
  } 
     return   true;   
  }   
 //验证mail的地址书写是否正确 
  function   VerifyEmail()   
  {   
  var   reg=/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;   
  if(!reg.test(document.getElementById("Email").value))   
  {   
  alert("Invalid email address!")   
  return   false;   
  }   
  return   true;   
  }