Q：如何实现在网页上双击左键滚屏？
A：代码如下：
<script language="javascript">
var currentpos,timer;
function initialize()
{
timer=setInterval("scrollwindow()",2);
}
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>