html1是表单，html2是背景。这个背景可以为html格式，也可以为js格式。但都引入失败了。
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>input练习</title>
<link rel="import" href="background.html">
<script src="js/mouse.js"></script>
<style type="text/css">
input{
border-radius:20px;
border:solid 1px gray;
background:rgba(255,255,255,0.15)
}
.button{
border-radius:8px;
width:30px;
height:30px;
font-size:16px;
}
hr{/*透明渐变水平线*/
height:1px;
border:none;
border-top:2px dashed #eff5fa;
width:80%;
}
textarea{
background:rgba(255,255,255,0.15);
border:solid 1px gray;
border-radius:15px;
}
</style>
</head>
<body>
<div class="box">
<form>
<h3>个人信息</h3>
<br><hr/>
姓名：<input type="text" maxlength="10"/>
<br>
密码：<input type="password" name="" />
<br>
年龄：<input type="number" name="" />
<br>
性别：<input type="radio" name="gender" value="男"/>男 <input type="radio" name="gender" value="女"/>女
<br><hr/>
<p>喜爱清单</p>
喜爱的颜色：<input type="text"/><br>
喜爱的书籍：<input type="text"/><br>
喜爱的画作：<input type="text"/><br>
喜爱的乐器：<input type="text"/><br>
喜爱的歌曲：<input type="text"/><br>
喜爱的影视：<input type="text"/><br>
喜爱的网站：<input type="text"/><br>
喜爱的水果：<input type="text"/><br>
<br><hr/>
<input type="button" style="background-color:#d0ebfc;border:solid 1px gray;" value="按钮"/>
<input type="submit" style="background-color:#effacf;border:solid 1px gray;" value="提交"/>
<input type="reset" style="background-color:#fcdef7;border:solid 1px gray;" value="重置" />
<br><hr/>
<textarea rows="5" cols="40"></textarea>
</form>
</div>
</body>
</html>
<!d>
<html lang="en">
<meta charset="UTF-8">
<title>蛛网动态背景</title>
<head>
</head>
<body>
<script>
window.onload=function(){
//定义body的margin由默认值8px->0px
document.body.style.margin="0";
document.body.style.background="#30333F";
//创建canvas画布
document.body.appendChild(document.createElement('canvas'));
var canvas = document.querySelector('canvas'),
ctx = canvas.getContext('2d') //ctx返回一个在canvas上画图的api/dom
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
canvas.style.position='fixed';
ctx.lineWidth = .3;
ctx.strokeStyle = (new Color(150)).style;
//定义鼠标覆盖范围
var mousePosition = {
x: 30 * canvas.width / 100,
y: 30 * canvas.height / 100
};
var dots = {
nb: 1000,//Dot的总数
distance: 50,
d_radius: 100,
array: []
};
//创建颜色类，Color类返回字符串型rgba（*,*,*,.8）
function mixComponents(comp1, weight1, comp2, weight2) {
return (comp1 * weight1 + comp2 * weight2) / (weight1 + weight2);
}
function averageColorStyles(dot1, dot2) {
var color1 = dot1.color,
color2 = dot2.color;
var r = mixComponents(color1.r, dot1.radius, color2.r, dot2.radius),
g = mixComponents(color1.g, dot1.radius, color2.g, dot2.radius),
b = mixComponents(color1.b, dot1.radius, color2.b, dot2.radius);
return createColorStyle(Math.floor(r), Math.floor(g), Math.floor(b));
}
function colorValue(min) {
return Math.floor(Math.random() * 255 + min);
}
function createColorStyle(r,g,b) {
return 'rgba(' + r + ',' + g + ',' + b + ', 0.8)';
}
function Color(min) {
min = min || 0;
this.r = colorValue(min);
this.g = colorValue(min);
this.b = colorValue(min);
this.style = createColorStyle(this.r, this.g, this.b);
}
//创建Dot类以及一系列方法
function Dot(){
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.vx = -.5 + Math.random();
this.vy = -.5 + Math.random();
this.radius = Math.random() * 2;
this.color = new Color();
}
Dot.prototype = {
draw: function(){
ctx.beginPath();
ctx.fillStyle = this.color.style;
ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
ctx.fill();
}
};
function moveDots() {//Dot对象的移动
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
if(dot.y < 0 || dot.y > canvas.height){
dot.vx = dot.vx;
dot.vy = - dot.vy;
}
else if(dot.x < 0 || dot.x > canvas.width){
dot.vx = - dot.vx;
dot.vy = dot.vy;
}
dot.x += dot.vx;
dot.y += dot.vy;
}
}
function connectDots(){//DOt对象的连接
for(i = 0; i < dots.nb; i++){
for(j = i; j < dots.nb; j++){
i_dot = dots.array[i];
j_dot = dots.array[j];
if((i_dot.x - j_dot.x) < dots.distance && (i_dot.y - j_dot.y) < dots.distance && (i_dot.x - j_dot.x) > - dots.distance && (i_dot.y - j_dot.y) > - dots.distance){
if((i_dot.x - mousePosition.x) < dots.d_radius && (i_dot.y - mousePosition.y) < dots.d_radius && (i_dot.x - mousePosition.x) > - dots.d_radius && (i_dot.y - mousePosition.y) > - dots.d_radius){
ctx.beginPath();
ctx.strokeStyle = averageColorStyles(i_dot, j_dot);
ctx.moveTo(i_dot.x, i_dot.y);
ctx.lineTo(j_dot.x, j_dot.y);
ctx.stroke();//绘制定义的路线
ctx.closePath();//创建从当前点回到起始点的路径
}
}
}
}
}
function createDots(){//创建nb个Dot对象
for(i = 0; i < dots.nb; i++){
dots.array.push(new Dot());
}
}
function drawDots() {//引用Dot原型链，使用draw方法，在canvas上画出Dot对象
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
dot.draw();
}
}
function animateDots() {
ctx.clearRect(0, 0, canvas.width, canvas.height);//清除画布，否则线条会连在一起
moveDots();
connectDots();
drawDots();
requestAnimationFrame(animateDots);
}
createDots();//使用创建Dot类函数
requestAnimationFrame(animateDots);//使用canvas独有的60Hz刷新屏幕画布的方法
document.querySelector('canvas').addEventListener('mousemove',function(e){
mousePosition.x = e.pageX;
mousePosition.y = e.pageY;
})
document.querySelector('canvas').addEventListener('mouseleave',function(e){//鼠标离开时，连接自动返回到画布中心
mousePosition.x = canvas.width / 2;
mousePosition.y = canvas.height / 2;
})
}
</script>
</body>
</html>
```
