JSFX_KeepInView = function(id){
	var getPageY=function(el){return(el==null)?0:el.offsetTop+getPageY(el.offsetParent);};
	var getScrollTop=function(){return document.body.scrollTop||document.documentElement.scrollTop};
	var el=document.getElementById(id);if(el==null)return;
	if(el.style.position=="absolute"){el.startPageTop=-el.offsetTop;el.currentX=el.offsetLeft;el.currentY=el.offsetTop;}
	else{el.style.position="relative";el.startPageTop=getPageY(el);el.currentX=el.currentY=0;};
	el.floatInView=function(){
		var targetY=(getScrollTop()>this.startPageTop)?getScrollTop()-this.startPageTop:0;
		this.currentY+=(targetY-this.currentY)/4;this.style.top=this.currentY+"px";};
	setInterval('document.getElementById("'+id+'").floatInView()',40);
};JSFX_KeepInView ("banner");