通过简单的算法实现这个迷宫图随机生成效果，运行代码后多刷新页面几次看看，在需要用到的页面上套用即可。
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<title>js随机生成一张迷宫图特效_武鸣人</title>
<style>
.maze_outer{position:absolute; left:20px; top:50px; }
.maze_inner{position:relative; }
.maze_cell{position:absolute; width:16px; height:16px; overflow:hidden; border:1px solid black; }
</style>
<script>
window.onload = init;
function init(){
var mz = new Maze();
mz.create();
document.body.appendChild(mz.toHTMLObject());
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
function Maze(){
this.size = [40,40];
this.inited = false;
this.init = function(){
this.nodes = [];
for (var y=0; y<this.size[1]; y++){
this.nodes[y] = [];
for (var x=0; x<this.size[0]; x++){
this.nodes[y][x] = new Node(this, x, y);
}
}
this.inited = true;
}
this.get_node = function(x,y){
return this.inited && x >=0 && x < this.size[0] && y >= 0 && y < this.size[1] && this.nodes[y][x];
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
this.create = function(){
if (!this.inited) this.init();
var try_count = 0;
var points = [];
var most_rightbottom_point = this.nodes[0][0];
//var max_p_len = 0;
var cp;
points.push(this.nodes[0][0]);
while(points.length > 0){
var np = random_init_cell(cp = points.pop());
if (cp.x >= most_rightbottom_point.x && cp.y >= most_rightbottom_point.y) most_rightbottom_point = cp;
for (var i=0; i<np.length; i++) points.unshift(np[i]);
//if (max_p_len < points.length) max_p_len = points.length;
if (points.length == 0 && !this.nodes[this.size[1]-1][this.size[0]-1].inited && ++try_count < 1000){
most_rightbottom_point.inited = false;
points.push(most_rightbottom_point);
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
//alert("最大并发路径数：" + max_p_len+"\r\n尝试次数："+try_count);
function random_init_cell(p){
if (p.inited) return [];
var re = [];
for (var i=0, dir; i<Maze.DIR.length && (dir = Maze.DIR[i]); i++){
if (p[dir]() && !p.dir[dir] && Math.random() < ratio(dir, p)){
p.open(dir);
re.push(p[dir]());
}
}
p.inited = true;
return re;
}
function ratio(dir, p){
var c = p.branches_count()*0.5 + p[dir]().branches_count() * 10;
return Math.pow(0.4,c);
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
this.toHTMLObject = function (){
var obj_outer = document.createElement("div");
obj_outer.className = "maze_outer";
var obj_inner = document.createElement("div");
obj_inner.className = "maze_inner";
obj_outer.appendChild(obj_inner);
if (!this.inited) this.init();
for (var y=0; y<this.size[1]; y++){
for (var x=0; x<this.size[0]; x++){
var nd = document.createElement("div");
nd.className = "maze_cell";
nd.x = x; nd.y = y;
nd.style.left = x * 15 + "px";
nd.style.top = y * 15 + "px";
for (var i in this.nodes[y][x].dir){
if (this.nodes[y][x].dir[i]) nd.style["border" + i.charAt(0).toUpperCase() + i.substring(1)] = "1px solid white";
}
obj_inner.appendChild(nd);
}
}
return obj_outer;
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
Maze.DIR = ["top", "left", "bottom", "right"];
function Node(maze, x, y){
this.maze = maze;
this.x = x || 0;
this.y = y || 0;
this.dir = {};
this.inited = false;
this.left = function(){ return this.maze.get_node(x-1, y); }
this.right = function(){ return this.maze.get_node(x+1, y); }
this.top = function(){ return this.maze.get_node(x, y-1); }
this.bottom = function(){ return this.maze.get_node(x, y+1); }
this.open = function(d){
if (d == "top"){
this.dir.top = this.top().dir.bottom = true;
}else if (d == "right"){
this.dir.right = this.right().dir.left = true;
}else if (d == "bottom"){
this.dir.bottom = this.bottom().dir.top = true;
}else if (d == "left"){
this.dir.left = this.left().dir.right = true;
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
this.branches_count = function(){
var re = 0;
for (var i in this.dir) if (this.dir[i]) re++;
return re;
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
</script>
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