// JavaScript Document
function vote(id)
{
   var url="http://volunteer.2008.sohu.com/flash/checkvote.php"; 
   var para="vid="+id;
   var myAjax = new Ajax.Request( url, {method: 'post', parameters: para, onComplete: showresult } );
}

function showresult(response)
{
    var xmlDom = response.responseXML;
    var code=xmlDom.getElementsByTagName('code')[0].firstChild.data;
    if(code==1)
    alert("投票成功");
    else if(code==2)
    alert("不能重复投票");
    else if(code==3)
    {
        alert("请您先登陆");
        window.location='../index.html';
    }
}