var divs = document.getElementsByTagName("div");

var timerId = setInterval(creatDiv, 500);

var timerId2 = setInterval(gor, 1);

var timerId3 = setInterval(yidong, 1);

var sheArr = new Array();

var she = document.getElementById("se");

sheArr.push(she);

var gwArr = [];

var speedX = -1;

var speedY = -1;

//创建随机的食物

function creatDiv() {

var div = document.createElement("div");

var suiji = suiJi(0, 256);

var suiji2 = suiJi(0, 256);

var suiji3 = suiJi(0, 256);

div.style.background = "rgb(" + suiji + "," + suiji2 + "," + suiji3 + ")";

div.style.width = "20px";

div.style.height = "20px";

div.style.position = "absolute";

div.style.left = suiJi(50, 1200) + "px";

div.style.top = suiJi(10, 600) + "px";

document.body.appendChild(div);

gwArr.push(div);

if(gwArr.length > 5) {

clearInterval(timerId);

}

}

document.onmousemove = function(e) {

var ev = e || event;

if(ev.clientX >= parseInt(sheArr[0].style.left) + 20&&ev.clientY == parseInt(sheArr[0].style.top) + 20) {

speedX = 1;

speedY= 0;

}

if(ev.clientX <= parseInt(sheArr[0].style.left) + 20&&ev.clientY == parseInt(sheArr[0].style.top) + 20) {

speedX = -1;

speedY= 0;

}

if(ev.clientX == parseInt(sheArr[0].style.left) + 20&&ev.clientY >= parseInt(sheArr[0].style.top) + 20) {

speedX = 0;

speedY= 1;

}

if(ev.clientX == parseInt(sheArr[0].style.left) + 20&&ev.clientY <= parseInt(sheArr[0].style.top) + 20) {

speedX = 0;

speedY= -1;

}

if(ev.clientX > parseInt(sheArr[0].style.left) + 20) {

speedX = 1;

}

if(ev.clientX < parseInt(sheArr[0].style.left) + 20) {

speedX = -1;

}

if(ev.clientY > parseInt(sheArr[0].style.top) + 20) {

speedY = 1;

}

if(ev.clientY < parseInt(sheArr[0].style.top) + 20) {

speedY = -1;

}

//  sheArr[0].style.left = ev.clientX-20+'px';

//              sheArr[0].style.top = ev.clientY-20+'px';

//              sheArr[i].style.left = sheArr[i-1].style.left;

//              sheArr[i].style.top = sheArr[i-1].style.top;

}

function yidong() {

if(parseInt(sheArr[0].style.left)<=0||parseInt(sheArr[0].style.left)>=document.clientWidth){

speedX *= -1;

}

if(parseInt(sheArr[0].style.top)<=0||parseInt(sheArr[0].style.top)>=document.clientHeight){

speedY *= -1;

}

sheArr[0].style.left = parseInt(sheArr[0].style.left) + speedX*3 + "px";

sheArr[0].style.top = parseInt(sheArr[0].style.top) + speedY*3 + "px";

for(var i = sheArr.length - 1; i > 0; i--) {

sheArr[i].style.left = sheArr[i-1].style.left;

sheArr[i].style.top = sheArr[i-1].style.top;

}

}

function gor() {

for(var i = 0; i < gwArr.length; i++) {

if(she.offsetTop + she.offsetHeight >= gwArr[i].offsetTop && she.offsetTop <= gwArr[i].offsetTop + gwArr[i].offsetHeight && she.offsetLeft + she.offsetWidth >= gwArr[i].offsetLeft && she.offsetLeft <= gwArr[i].offsetLeft + gwArr[i].offsetWidth) {

console.log("撞上了");

document.body.removeChild(gwArr[i]);

creatShe();

gwArr.splice(i, 1);

if(gwArr.length < 1) {

clearInterval(timerId);

timerId = setInterval(creatDiv, 500);

}

}

}

}

function creatShe() {

var div = document.createElement("div");

div.style.background = "rgb(" + suiJi(0, 256) + "," + suiJi(0, 256) + "," + suiJi(0, 256) + ")";

div.style.width = "40px";

div.style.height = "40px";

div.style.position = "absolute";

div.style.borderRadius = "50%";

document.body.appendChild(div);

div.style.top = '-50px';

div.style.left = '-50px';

div.style.zIndex = m;

}

function suiJi(min, max) {

return Math.floor(Math.random() * (max - min)) + min;

}