function scrolling(objId,sec1,sec2,speed,height){
	this.objId=objId;
	this.sec1=sec1;
	this.sec2=sec2;
	this.speed=speed;
	this.height=height;
	this.h=0;
	this.div=document.getElementById(this.objId);
	this.htmltxt=this.div.innerHTML;
	this.div.innerHTML=this.htmltxt+this.htmltxt;
	this.div.isover=false;
	this.div.onmouseover=function(){this.isover=true;}
	this.div.onmouseout=function(){this.isover=false;}
	var self=this;
	this.div.scrollTop=0;
	window.setTimeout(function(){self.play()},this.sec1);
}
scrolling.prototype={
	play:function(){
	var self=this;
	if(!this.div.isover){
		this.div.scrollTop+=this.speed;
		if(this.div.scrollTop>this.div.scrollHeight/2){
			this.div.scrollTop=0;
		} else {
			this.h+=this.speed;
			if(this.h>=this.height){
				if(this.h>this.height|| this.div.scrollTop%this.height !=0){ this.div.scrollTop-=this.h%this.height; }
				this.h=0;
				window.setTimeout(function(){self.play()},this.sec1);
				return;
			}
		}
	}
	window.setTimeout(function(){self.play()},this.sec2);
},
prev:function(){
	if(this.div.scrollTop == 0)
	this.div.scrollTop = this.div.scrollHeight/2;
	this.div.scrollTop -= this.height;
},
next:function(){
	if(this.div.scrollTop == this.div.scrollHeight/2)
	this.div.scrollTop =0;
	this.div.scrollTop += this.height;}
}