/**
 * @author Administrator
 */


	
	function lb(id,speed){
	var oAd=document.getElementById(id);
	var oUl=oAd.getElementsByTagName("div")[0];
	var aLi=oUl.getElementsByTagName("div");
	var speed=speed;
	var timer=null;
	oUl.innerHTML+=oUl.innerHTML;
	oUl.style.width=((aLi[0].offsetWidth)*aLi.length/2)+"px";

	for(var i=0;i<aLi.length;i++){
		aLi[i].onmouseover=function(){
			//alert("111");
			clearInterval(timer);
			
		}
		aLi[i].onmouseout=function(){
			clearInterval(timer);
			timer=setInterval(auto,30);
		}
	}
		timer=setInterval(auto,30);
	function auto(){
		oUl.style.left=oUl.offsetLeft-speed+'px';
		if(oUl.offsetLeft<-oUl.offsetWidth/2){
			oUl.style.left='0px';
		}
		
	}
	}
	
	
	//获取class元素
function getElementByclassName(className)
{
	var obj=null,obj_num=null;
        classElement = new Array(); 
        obj=document.getElementsByTagName("*"); 
        obj_num=obj.length;
         for(i=0;i<obj_num;i++)
          {
                if(obj.item(i).className==className) 
                 {
                     classElement.push(obj.item(i));
                 }
          }
 return classElement; 
}
//实现多事件绑定
 function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != "function") {
    window.onload = func;
  } else {
    window.onload = function() {
		
		
		
		
		
      oldonload();
      func();
    }
  }
}



window.onload=function(){
	if(document.getElementById("pic_div")){
	lb("pic_div","1");}
	
	}