function rewriteimg() {
    var a=document.createElement('script');
    document.body.appendChild(a);
    a.src='http://login.tom.com/captcha/reset.php?type=1'+'&'+Math.random();
}

function _gg_dm() {
    var a = document.domain.split('.');
    if(a.length>=2) {
        return a[a.length-2]+'.'+a[a.length-1];
    }
    else {
        return document.domain;
    }
}


document.write("<script>var d =new Date();d.setTime(d.getTime()+60*60*1000);document.cookie='post_key=a76595a43cbfbe937a8c12644fd62403;expires='+d.toGMTString()+';domain='+_gg_dm();document.write(\"<img title='看不清?点击更换验证码!' alt='看不清？点击更换验证码!' id='v_i_0980t' onclick=\\\"rewriteimg();\\\" src=http://login.tom.com/captcha/draw.php?post_key=a76595a43cbfbe937a8c12644fd62403&type=1>\");</script>");