function goTopEx(){
		var obj=document.getElementById("goTop");
		function getScrollTop(){
				return document.documentElement.scrollTop;
			}
		function setScrollTop(value){
				document.documentElement.scrollTop=value;
			}
		window.onscroll=function(){
				var sT1=getScrollTop();
				var i=0;
				var checkStop=setInterval(showGoTop,500);
				obj.style.display="none";	
				function showGoTop(){
						if(getScrollTop()==sT1&&i>1){
								clearInterval(checkStop);
								getScrollTop()>0?obj.style.display="":obj.style.display="none";	
								var mm=setInterval(ssBtn,20);
								obj.style.bottom=0;
								var s=0;
								function ssBtn(){
										if(s<21){s+=2;obj.style.bottom=s+"px";}else{clearInterval(mm)}	
									}
							}
						i++;	
					}
			}	
		obj.onclick=function(){
			var goTop=setInterval(scrollMove,10);
			function scrollMove(){
					setScrollTop(getScrollTop()/1.1);
					if(getScrollTop()<1)clearInterval(goTop);
				}
		}
	}