var url_login="ashx/AccountLogin.ashx";
function AccountLogin()
{
    var userId = document.getElementById("account_user").value;
    var userPass = document.getElementById("account_pass").value;
    if(isNull(userId))
   {
      alert("请输入用户名！");
      document.getElementById("account_user").focus();
      return false;
   }  
   if(isNull(userPass))
   {
      alert("请输入密码！");
      document.getElementById("account_pass").focus();
      return false;
   }
   var code = document.getElementById("txtCode").value;
   if(isNull(code))
   {
      alert("请输入验证码！");
      document.getElementById("txtCode").focus();
      return false;
   }
    var param = "FUN=AcLogin&UserID="+userId+"&UserPass="+userPass+"&Code="+code;
    var ajax = new Ajax.Request(url_login,{method:"post",parameters:param,onComplete:AccountLoginComplete});
}

function AccountLoginComplete(ajaxResponse)
{
    switch(ajaxResponse.responseText)
   {
      case "-1":
         alert("登录验证出错！");
         break;
      case "0":
         alert("输入的验证码不对！");
         break;
      case "2":
         alert("输入的用户名或密码不对！");
         break;
      case "3":
         alert("用户已经被禁止！");
         break;
      case "4":
         alert("您还未激活，请先激活再登录！");
         break;
      case "1":
         alert("登录成功！");  
         window.location.reload();          
         break;
      default:
        alert("未知错误");
        break;
   }
}

function abc_ref()
{document.getElementById('img_code').src ='ExchangeCheckCode.ashx?id='+Math.random();
}