html5 javascript 事件练习1

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>js练习-变化的颜色</title>
   <style type="text/css">

#div1{
margin: 15px auto;
margin-top: 200px;
background: orange;
200px;
height: 200px;
border-radius: 200px;
}
</style>
</head>

<body>
   <div id="div1"></div>

<script>
var dd=document.getElementById('div1');
dd.onclick=houzi1;

function houzi1(){
   dd.style.background='red';
   // dd.onclick=houzi2;
   setTimeout('houzi2()',500);
}

function houzi2(){
   dd.style.background='orange';
   // dd.onclick=houzi3;
   setTimeout('houzi3()',500);
}
function houzi3() {
   dd.style.background='blue';
   // dd.onclick=houzi1;
   setTimeout('houzi2()',500);
}
</script>

</body>
</html>

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