自動生成10個Li，代碼如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
div{
width:50px;
height:50px;
background:red;
border:1px solid #000;
font:40px/50px '宋體';
left:0;
top:0;
position:absolute;
text-align:center;
}
</style>
<script>
window.onload = function(){
var oBtn = document.getElementById("btn");
var oDiv = document.getElementsByTagName("div");
oBtn.onclick = function(){
for(var i=0;i<10;i++){
document.body.innerHTML += '<div>'+i+'</div>';
oDiv[i].style.left=10+i*60+'px';
oDiv[i].style.top=60+'px';
};
for(var i=0;i<10;){
oDiv[i].style.background='red';
oDiv[i+1].style.background='yellow';
oDiv[i+2].style.background='blue';
oDiv[i+3].style.background='green';
i+=4;
}
};
};
</script>
</head>
<body>
<input id="btn" type="button" value="自動生成10個Li"/>
</body>
</html>
