//文字上下滚动方法一,需用到定位
//var r = 0;
//var express = document.getElementById("express")
//function show() {
//	var dome1 = document.getElementById("dome1");
//	var dome2 = document.getElementById("dome2");
//	
//	//var dome = document.getElementById("dome");
//	
//	if(r <= -806) {
//		r = 0;
//	} 
//		express.style.top=0-r + "px";
//		r++;
//}
//express.onmouseover=function(){clearInterval(fs); };
//function sfe(){fs=setInterval(show, 50);}

//文字上下滚动方法二
var dome = document.getElementById("dome");
var dome1 =  document.getElementById("dome1");

function init(){
	dome.scrollTop +=5;
	if(dome.scrollTop>=800){
		dome.scrollTop=0;
	}
}
var t = setInterval("init()",50)
dome.onmouseover = function(){
	clearInterval(t)
}

dome.onmouseout = function(){
	 t = setInterval("init()",50)
}