js,jquery写的
1.效果图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
<style type="text/css" media="screen">
.content{
width: 600px;
height: 600px;
margin: 0 auto;
border: 4px solid green;
}
.box{
width: 100px;
height: 100px;
border: 2px solid black;
text-align: center;
}
</style>
</head>
<body>
<div class="content">
<div class="box"><h1>烦人的广告！</h1></div>
</div>
<script type="text/javascript">
// $('.box').parent().width()
$(function(){
var Timer;
var x=0;
var y=0;
var timer= setInterval(fn,10);
function fn(){
x++;
y++;
$('.box').css({'position':'relative','left':''+y+'px','top':''+x+'px'});
if(y>$('.box').parent().width()-$('.box').width()){
y=0;
x=0;
}
if(x>$('.box').parent().height()-$('.box').height()){
x=0;
y=0;
}
}
$('.box').mouseenter(function() {
clearTimeout(timer);
clearTimeout(Timer);
});
$('.box').mouseleave(function() {
Timer = setInterval(fn,10);
});
})
</script>
</body>
</html>