http://www.ablanxue.com/prone_2866_1.html
window.parent.onscroll = window.parent.onresize = window.onload
=function () {
var oFix_box =
document.getElementById(‘select-panel‘);
var oscrollTop =
window.parent.document.documentElement.scrollTop ||
window.parent.document.body.scrollTop;
oFix_box.style.top = oscrollTop +
window.parent.document.documentElement.clientHeight - oFix_box.offsetHeight -
224 + ‘px‘;
$("#select-panel").stop(true,true).animate({ "top": top1 },
700);
}