function IsCheck()
{
    var CurrCode=document.getElementById("txtloginverify").value;
    var VerifyCode=getCookie("CheckCode");
  if(VerifyCode!=CurrCode)
  {
    window.document.getElementById("labError").innerHTML ="<font style='color:#ff0000;font-size:12px'>对不起，您输入的验证有误，请重新输入</font>";   
    return false; 
  } 
  else
  { 
    return true;
  }
}
    function getCookie(name)
    {
        var arg = name + "=";
        var alen = arg.length;
        var clen = document.cookie.length;
        var i = 0;
        while(i < clen)
        {
            var j = i + alen;
            if (document.cookie.substring(i, j) == arg)
            {
                return getCookieVal(j);
            }
            i = document.cookie.indexOf(" ", i) + 1;
            if(i == 0) break;
        }
        return;
    }
      //utility function called by getCookie()
    function getCookieVal(offset)
    {
        var endstr = document.cookie.indexOf(";", offset);
        if(endstr == -1)
        {
            endstr = document.cookie.length;
        }
        return unescape(document.cookie.substring(offset, endstr));
    } 
// JavaScript Document