var slide = {
        flor:0,
        num:0,
        id:function(obj){
            return document.getElementById(obj);
        },
        moveSpeed : function(objRoot,objNum){
            if (objNum>objRoot)
            {
               objRoot = objRoot+5;
            }
           return  (objRoot) + (Math.floor((objNum-objRoot)/4));
        },
        moveLeft : function(obj,meth,time){
            var objPosi = parseInt(obj.offsetLeft);
            obj.style.left = slide.moveSpeed(objPosi,slide.num)+"px";
            setTimeout(function(){slide.moveLeft(obj,meth,time)
                },time
            )
        },
        move  : function(){
            var objLeft  = slide.id('left');
            var objRgiht = slide.id('right');
            var slideobj = slide.id('slide');
            var slidePar = slide.id('slidePar');
            var slidechild = slideobj.getElementsByTagName('li');
            var leftRange =null;
            var rightRange =null;
            objRgiht.onclick = function(){
		  leftRange = slidechild.length*slidechild[0].offsetWidth;
			if( slidechild.length > 1) {
			  if (slidePar.offsetWidth < leftRange){
				if ((-slide.num) + slidePar.offsetWidth < slideobj.offsetWidth ){
					slide.num = (slide.num - slidechild[0].offsetWidth);
				}
			  }
			}
            }
            objLeft.onclick = function(){
                if (slide.num < 0){
                    slide.num = (slide.num + slidechild[0].offsetWidth);
                }
            }
            slide.moveLeft(slide.id('slide'),slide,60);
        }
    }