js 验证用户名密码后的跳转

<script
type="text/javascript">

function usename_error(){

 var
name=document.getElementByIdx_x("username").value;

 var
pass=document.getElementByIdx_x("password").value;

   if(name==""||pass==""){

     
alert("账号密码为空！！");

   
location='000.html';//失败跳转到当前页面 

   }

   else{

    
alert("欢迎！！");

    
location='doLogin.jsp';//成功跳转到doLogin

    
}

    
return false;

   }

</script>

<form method="get" onsubmit="return
usename_error()">

<input name="username" id="username" type="text"
/>

<input name="password" id="password" type="text"
/>

<input type="submit" value="ENTER"
id="subscribe_button" />

</form>