function initmqmove(insertspeed){
   var odiv = document.getelementbyid('div1');
   var oul = document.getelementbyid('ul1');
   var speed = insertspeed;//初始化速度
 
   oul.innerhtml += oul.innerhtml;//图片内容*2-----参考图（2）
   var oli= oul.getelementsbytagname('li');
   oul.style.width = oli.length*440+'px';//设置ul的宽度使图片可以放下
 
   var obtn1 = document.getelementbyid('btn1');
   var obtn2 = document.getelementbyid('btn2');
 
 
   function move(){
    if(oul.offsetleft<-(oul.offsetwidth/2)){//向左滚动，当靠左的图4移出边框时
     oul.style.left = 0;
    }
 
    if(oul.offsetleft > 0){//向右滚动，当靠右的图1移出边框时
     oul.style.left = -(oul.offsetwidth/2)+'px';
    }
 
    oul.style.left = oul.offsetleft + speed + 'px';
   }
 
   obtn1.addeventlistener('click',function(){
    speed = -2;
   },false);
   obtn2.addeventlistener('click',function(){
    speed = 2;
   },false);
 
   var timer = setinterval(move,30);//全局变量 ，保存返回的定时器
 
   odiv.addeventlistener('mouseout', function () {
    timer = setinterval(move,30);
   },false);
   odiv.addeventlistener('mousemove', function () {
    clearinterval(timer);//鼠标移入清除定时器
   },false);
  }