function Picture(nameA,nameB,nameC){//建创类
 this.NameA=nameA;
 this.NameB=nameB;
 this.NameC=nameC;
}
Picture.prototype.LeftRightScroll=function(){
var ScrollMain=document.getElementById(this.NameA) 
var Regional1=document.getElementById(this.NameB) 
var Regional2=document.getElementById(this.NameC)
var dir=1 //每步移动像素，大＝快，正左负右 
var speed=30//循环周期（毫秒）大＝慢 
Regional2.innerHTML=Regional1.innerHTML 
function Marquee(){//正常移动 
if (dir>0  && (Regional2.offsetWidth-ScrollMain.scrollLeft)<=0) ScrollMain.scrollLeft=0 
if (dir<0 &&(ScrollMain.scrollLeft<=0)) ScrollMain.scrollLeft=Regional2.offsetWidth 
ScrollMain.scrollLeft+=dir 
ScrollMain.onmouseover=function() {clearInterval(MyMar)}//暂停移动 
ScrollMain.onmouseout=function() {MyMar=setInterval(Marquee,speed)}//继续移动 
} 
var MyMar=setInterval(Marquee,speed)
}

Picture.prototype.UpDownScroll=function(){
var ScrollMain=document.getElementById(this.NameA) 
var Regional1=document.getElementById(this.NameB) 
var Regional2=document.getElementById(this.NameC)
var dir=1 //每步移动像素，大＝快，正左负右 
var speed=30//循环周期（毫秒）大＝慢 
Regional2.innerHTML=Regional1.innerHTML 
function Marquee(){//正常移动 
if (dir>0 &&(Regional2.offsetHeight-ScrollMain.scrollTop)<=0) ScrollMain.scrollTop=0 
if (dir<0 &&(ScrollMain.scrollTop<=0)) ScrollMain.scrollTop=Regional2.offsetHeight 
ScrollMain.scrollTop+=dir 
ScrollMain.onmouseover=function() {clearInterval(MyMar)}//暂停移动 
ScrollMain.onmouseout=function() {MyMar=setInterval(Marquee,speed)}//继续移动 
} 

var MyMar=setInterval(Marquee,speed)
}

window.onload = function () {
var obj1 = new Picture("demo","demo1","demo2");//实例
obj1.LeftRightScroll();
var obj2 = new Picture("demoA","demoB","demoC");//实例
obj2.LeftRightScroll();
//var ffff = new Start("select_no","select_img","true","false","none","block");
//ffff.Tab();
}