function changeMSN()
{
    document.getElementById("qq_id").href="http://bizapp.qq.com/webc.htm?new=0&sid=800015575&o=http://www.liyi99.com&q=7";
    var number=Math.ceil(Math.random()*10);
    number=number%2;
    if(number==0)
    {
      document.getElementById("msn_id").href="msnim:chat?contact=services@liyi99.com";
    }else{
      document.getElementById("msn_id").href="msnim:chat?contact=services1@liyi99.com";
    }
}