比较特殊的变换下拉选择菜单
<!-- http://www.knowsky.com -->
<!-- bbs http://bbs.knowsky.com-->
<!--把如下代码加入到<body>区域中-->
<script>
var currentpos,timer;
function initialize()
{
timer=setInterval("scrollwindow()",10);
}
function sc(){
clearInterval(timer);
}
function scrollwindow()
{
currentpos=document.body.scrollTop;
window.scroll(0,++currentpos);
if (currentpos != document.body.scrollTop)
sc();
}
document.onmousedown=sc
document.ondblclick=initialize
</script>