// 字体大小
function ContentSize(size)
{
var obj=document.getElementById("size");obj.style.fontSize=size+"px";
}
// 复制文本
function copyText(obj) 
{
var rng = document.body.createTextRange();rng.moveToElementText(obj);rng.scrollIntoView();rng.select();rng.execCommand("Copy");rng.collapse(false);
}

function DownImage(ImgD)
{ 
    var image=new Image(); 
    image.src=ImgD.src; 
    ImgD.width=135; 
    ImgD.height=135; 
}
var currentpos,timer;
function initialize()
{
timer=setInterval("scrollwindow()",80)//这里的80是滚动速度
}
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