fudong=function (id,_top,_left){
    		var me=id.charAt?document.getElementById(id):id, 
            d1=document.body, 
            d2=document.documentElement;
    		d1.style.height=d2.style.height='100%';
            me.style.top=_top?_top+'px':0;
            me.style.left=_left+"px";   //[(_left>0?'left':'left')]=_left?Math.abs(_left)+'px':0;
    		me.style.position='absolute';
    		setInterval(
                function (){
                    me.style.top=parseInt(me.style.top)+(Math.max(d1.scrollTop,d2.scrollTop)+_top-parseInt(me.style.top))*0.1+'px';
                },
                10+parseInt(Math.random()*10)
            );
    		return arguments.callee;
		};
		window.onload=function (){
		  fudong('xixi',1,-315);
		}
        
		lastScrollY=0; 
		var InterTime = 1;
		var maxWidth=-1;
		var minWidth=-315;
		var numInter = 8;
		var BigInter ;
		var SmallInter ;
		var o =  document.getElementById("xixi");
		var i = parseInt(o.style.left);
		function Big(){
            if(parseInt(o.style.left) < maxWidth){
				i = parseInt(o.style.left);
				i += numInter;	
				o.style.left=i+"px";	
				if(i==maxWidth) clearInterval(BigInter);
			}
		}
		function toBig(){
			clearInterval(SmallInter);
			clearInterval(BigInter);
			BigInter = setInterval(Big,InterTime);
		}
		function Small(){
			if(parseInt(o.style.left)>minWidth){
				i = parseInt(o.style.left);
				i -= numInter;
					o.style.left=i+"px";
				if(i==minWidth) clearInterval(SmallInter);
			}
		}
		function toSmall(){
			clearInterval(SmallInter);
			clearInterval(BigInter);
			SmallInter = setInterval(Small,InterTime);	
		}