js 验证用户名密码后的跳转

<scripttype="text/javascript">
function usename_error(){
 varname=document.getElementByIdx_x("username").value;
 varpass=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="returnusename_error()">
<input name="username" id="username" type="text"/>
<input name="password" id="password" type="text"/>
<input type="submit" value="ENTER"id="subscribe_button" />
</form>