<script>
			//用于判定是否是开始初始化方块
			var mark = false;
			var starttime, endtime, finaltime = 0;  //记录游戏时间
			var array = new Array();  //用一个数组装所有绿色方块对象
			var timerarr = new Array();  //记录每个绿色方块 和 对应的计时器id
			
			function move(e){
				var xy = document.getElementById("xy");
				var self = document.getElementById("self");
				x = e.clientX;
				y = e.clientY;
				xy.value = "当前坐标："+x +","+y;
				if(x>=454 && x<=530 &&y>=285 && y<=355 && mark==false){
						mark = true;
						initothers(20);
				}
				target(e,x,y);
			}
			
			//线宽4px  格边长36px   target函数定位白色方块的位置
			function target(e,x,y){
				
				var self = document.getElementById("self");
				if(x>=12 && x<=855 && y>=40 &&y<=525 && mark ==true){
					self.style.left = x +'px';
					self.style.top =  y +'px';
				}
			}
			//初始化白方块位置
			function init(){
				var today = new Date();
				starttime = today.getTime();
				document.getElementById("self").style.left = 454+'px';
				document.getElementById("self").style.top = 282+'px';
			}
			//用一个对象存储绿色方块信息
			function piece(){
				piece.prototype.id = -1;   //方块编号   从0开始
				piece.prototype.dire = 0;  //移动方向   1上 2下 3左 4右
				piece.prototype.top = 0;
				piece.prototype.left = 0;
			}

			//初始化num个绿色移动方块
			function initothers(num){
				for(var i=0;i<num;i++){
					document.getElementById("pan").innerHTML += "<div id='"+i+"'; style='height:36px;width:36px;background-color:#00FF00;z-index:100; position:absolute;left:-50px'></div>";
					//num1表示从横坐标出现还是纵坐标<1表示横 >1表示纵   num2 >1表示沿着坐标轴运动  <1表示逆着坐标走
					var num1 = Math.random()*2;
					var num2 = Math.random()*2;
					var top1 = 43;   //top1表示从上向下移动  
					var top2 = 563;  //top2表示从下向上移动
					var left1 = 14;  //left1表示左-->右
					var left2 = 894;  //右-->左
					var p = new piece();
					p.id = i;
					
					if(num1<1){
						if(num2>1){  //从上往下移动
							p.dire = 2;
							p.top = top1;
							p.left = (Math.ceil(Math.random()*23)*40-26);
							document.getElementById(i).style.left = p.left+'px';
							document.getElementById(i).style.top = top1+'px';
							
						}else{   //从下往上移动
							p.dire = 1;
							p.top = top2;
							p.left = (Math.ceil(Math.random()*23)*40-26);
 							document.getElementById(i).style.left = p.left+'px';
 							document.getElementById(i).style.top = top2+'px';
 							
						}
					}else{
						//从左向右移动
						if(num2>1){
							p.dire = 4;
							p.top = (Math.ceil(Math.random()*14)*40+3);
							p.left = left1;
							document.getElementById(i).style.left = left1+'px';
							document.getElementById(i).style.top = p.top+'px';
						}else{  //右向左
							p.dire = 3;
							p.top = (Math.ceil(Math.random()*14)*40+3);
							p.left = left2;
							document.getElementById(i).style.left = left2+'px';
							document.getElementById(i).style.top = p.top+'px';
						}
					}
					array.push(p);
				}
				
				//初始化完成  触发移动
				var n;
				for(n in array){
					go(n,array[n].id,array[n].dire);
				}
			}
			
			//重新定位一个绿色方块location
				function location(timerid,i,n,p){
					
					clearInterval(timerarr[timerid]);
					//alert(timerarr[timerid]);
					var num1 = Math.random()*2;
					var num2 = Math.random()*2;
					var top1 = 43;   
					var top2 = 563;  
					var left1 = 14; 
					var left2 = 894; 
					
					if(num1<1){
						if(num2>1){ 
							p.dire = 2;
							p.top = top1;
							p.left = (Math.ceil(Math.random()*23)*40-26);
							document.getElementById(i).style.left = p.left+'px';
							document.getElementById(i).style.top = top1+'px';
						}else{  
							p.dire = 1;
							p.top = top2;
							p.left = (Math.ceil(Math.random()*23)*40-26);
 							document.getElementById(i).style.left = p.left+'px';
 							document.getElementById(i).style.top = top2+'px';
						}
					}else{
						if(num2>1){
							p.dire = 4;
							p.top = (Math.ceil(Math.random()*14)*40+3)