function scrollBanner(timer,moveNumber){ 
	function move(o){ 
		var st = document.documentElement.scrollTop   +   o.t; 
		var sl = document.documentElement.scrollLeft   +   (o.c   ==   0   ?   o.a   :   document.documentElement.clientWidth   -   o.a   -   o.offsetWidth); 
		var tc = st - o.offsetTop,lc = sl - o.offsetLeft; 
		with(o.style){ 
		top = o.offsetTop   +   (tc   !=   0   ?   tc   /   Math.abs(tc)   :   0)   *   Math.min(Math.abs(tc),   moveNumber)   +   "px"; 
		left = o.offsetLeft   +   (lc   !=   0   ?   lc   /   Math.abs(lc)   :   0)   *   Math.min(Math.abs(lc),   moveNumber)   +   "px"; 
		} 
		if   (o.person)   { 
		with   (o.person.style)   { 
		top   =   o.offsetTop   +   "px"; 
		left   =   o.offsetLeft   +   o.offsetWidth   -   o.person.offsetWidth   +   "px"; 
		} 
		} 
	} 

	var   hidden   =   function()   { 
	var   o   =   this.parent; 
	window.clearInterval(o.interval); 
	o.parentNode.removeChild(o); 
	this.parentNode.removeChild(this); 
	} 

	this.add   =   function   (to,   t,   a,   c,   lo)   { 
/* 
to为object对象 
t为距离顶端距离 
当c   =   0的时候，a为距离左边的距离 
当c   !=   0的时候，a为距离右边的距离 
lo为关闭按钮 
*/ 
	var   div,   exec   =   function   ()   { 
	move(to); 
	}; 
	
	to.person   =   lo; 
	to.t   =   t; 
	to.a   =   a; 
	to.c   =   c; 
	with   (to.style)   { 
	position   =   "absolute"; 
	display   =   "block"; 
	top   =   document.documentElement.scrollTop   +   t; 
	left   =   document.documentElement.scrollLeft   +   (c   ==   0   ?   a   :   document.documentElement.clientWidth   -   a   -   to.offsetWidth); 
	} 

	if   ("undefined"   !=   typeof   lo)   { 
		with   (lo.style)   { 
		position   =   "absolute"; 
		display   =   "block"; 
		} 
	lo.onmousedown   =   hidden; 
	lo.parent   =   to; 
	} 
	exec(); 
	to.interval   =   window.setInterval(exec,   timer); 
	}; 
}