// JavaScript Document

var Fn = function(parentElem,space,interval){
    var timer = null;
    var obj = document.getElementById(parentElem);
    var innerDiv = obj.getElementsByTagName("div")[0];

    var childObj1 = obj.getElementsByTagName("ul")[0];
    var childObj2 = document.createElement("ul");
    innerDiv.appendChild(childObj2);
    if(childObj1.offsetWidth>=obj.offsetWidth){
    	childObj2.innerHTML = childObj1.innerHTML;
    	function Scroll(){
    		if(obj.scrollLeft>=childObj1.offsetWidth){
    			obj.scrollLeft -= childObj1.offsetWidth;
    		}else{
    			obj.scrollLeft += space;
    		}
    	}
    	timer = setInterval(Scroll,interval);
    	
    	obj.onmouseover = function(){
    		clearInterval(timer);
    	}
    	
    	obj.onmouseout = function(){
    		timer = setInterval(Scroll,interval);
    	}
    }
}

var scrollImg = new Fn("picshow",2,20);