摘要：<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8&
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获取随机色</title>
<script type="text/javascript" src="jquery.js"></script>
<style type="text/css">
a {
float:left;
display:block;
margin:50px;
width:200px;
line-height: 100px;
text-align: center;
height:200px;
color:#fff;
border-radius: 50px;
text-decoration: none;
}
</style>
<script type="text/javascript">
//改变标签的背景颜色
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')
$("#flashcolor").click(function(){
//alert("h1");
aa('a')
$bg=$('a').css('backgroundColor')
$('a').css('box-shadow','0px 0px 20px '+$bg)
$('a').text($bg);
//$('a').css('border-radius','20px ')
})
$('a').mouseover(function(){
$bg=$(this).css('backgroundColor')
$(this).css('box-shadow','0px 0px 20px '+$bg)
$(this).css('border-radius','20px ')
})
$('a').mouseleave(function(){
$(this).css('box-shadow','none')
$(this).css('border-radius','50px ')
})
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<div>
<button id="flashcolor">刷新颜色</button>
</div>
</body>
</html>
批改老师：天蓬老师批改时间：2019-01-11 22:40:55
老师总结：document.getElementsByTagName(tag)[i], 可以试一下这种语法: document.getElementsByTagName(tag).item(i), 也很好用
