一个超市管理系统,提供一些基本简单的操作,JSP+APACHE+ORCALE实现

				//左边
				var left_img=' ';
				
				//右边
				//var right_img='';
				
				var right_img='   ';
					var delta=0.05
					var collection;
					function floaters() {
						this.items	= [];
						this.addItem	= function(id,x,y,content)
								  {
									document.write(''+content+'');
									
									var newItem				= {};
									newItem.object			= document.getElementById(id);
									newItem.x				= x;
									newItem.y				= y;
				
									this.items[this.items.length]		= newItem;
								  }
						this.play	= function()
								  {
									collection				= this.items
									setInterval('play()',10);
								  }
						}
						function play()
						{
				
							for(var i=0;i							{
								var followObj		= collection[i].object;
								var followObj_x		= (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
								var followObj_y		= (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);
				
								if(followObj.offsetLeft!=(document.body.scrollLeft+followObj_x)) {
									var dx=(document.body.scrollLeft+followObj_x-followObj.offsetLeft)*delta;
									dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
									followObj.style.left=followObj.offsetLeft+dx;
									}
				
								if(followObj.offsetTop!=(document.body.scrollTop+followObj_y)) {
									var dy=(document.body.scrollTop+followObj_y-followObj.offsetTop)*delta;
									dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
									followObj.style.top=followObj.offsetTop+dy;
									}
								followObj.style.display	= '';
							}
						}	
						
					var theFloaters		= new floaters();
					theFloaters.addItem('followDiv1','document.body.clientWidth-100',39,''+right_img+'');
					theFloaters.addItem('followDiv2',20,39,''+left_img+'');
					theFloaters.play();