点击按钮刷新颜色
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>document</title>
<script type="text/javascript" src="./jquery.js"></script>
<style type="text/css">
a {
float:left;
display:block;
margin:50px;
width:100px;
line-height: 100px;
text-align: center;
height:100px;
color:#fff;
border-radius: 50px;
text-decoration: none;
}
</style>
<script type="text/javascript">
function aa(tag) {
var len=document.getElementsByTagName(tag).length
for(var i=0;i<len;i++){
document.getElementsByTagName(tag)[i].style.backgroundColor='rgb('+Math.floor(Math.random()*256)+','+Math.floor(Math.random()*256)+','+Math.floor(Math.random()*256)+')'
}
}
$(document).ready(function(){
aa('a')
$('button').click(function(){
aa('a');
})
$('a').click(
function(){
$(this).html(Math.floor(Math.random()*256));
}
)
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<button>刷新</button>
</body>
</html>
