<!doctype html>
<html>
<head>
<title>运动</title>
<meta charset="utf-8">
<style>
.div1{width:100px;height:100px;float:left;background:#ccc;margin:5px;}
</style>
<script>
window.onload=function()
{
aDiv=document.getElementsByClassName('div1');
for(var i=0;i<aDiv.length;i++)
{
aDiv[i].onclick=function(){
this.style.background="red";
// aDiv[i].style.background="red"; //为什么不能这样写呢？
}
}
}
</script>
</head>
<body>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
<div class="div1"></div>
</body>
</html>
HalfAnHour
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