在网页上双击滚动页面,单击停止

<SCRIPT language=JavaScript>var currentpos,timer;

function initialize(){    timer=setInterval("scrollwindow()",50);}function sc(){    clearInterval(timer);}function scrollwindow(){    currentpos=document.body.scrollTop;    window.scroll(0,++currentpos);    if (currentpos != document.body.scrollTop)    sc();}document.onmousedown=scdocument.ondblclick=initialize</SCRIPT>