AutoScroll

AutoScroll.js

// 自动滚动
// div#demo style:overflow:hidden
//     div#demo1
//     div#demo2
var SPEED = 60,
	demo2 = document.getElementById("demo2"),
	demo1 = document.getElementById("demo1"),
	demo = document.getElementById("demo");

function Marquee() {
	// demo1 显示完毕之后重新切换显示 demo1
	if (demo.scrollTop >= demo2.offsetTop) {
		demo.scrollTop -= demo1.offsetHeight;
	} else {
		demo.scrollTop++;
	}
}
demo2.innerHTML = demo1.innerHTML;
var MyMar = setInterval(Marquee, SPEED);
demo.onmouseover=function() { clearInterval(MyMar); }
demo.onmouseout=function() {MyMar = setInterval(Marquee, SPEED); }