鼠标滚轮放大缩小
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>练习1</title>
</head>
<style>
*{margin:0px;padding:0px;}
div{
width: 200px;
height: 200px;
margin: 0 auto;
margin-top: 99px;
background-color:#f60;
}
</style>
<script src="jquery-1.11.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$('div').on('zoomOut',function(){ //放大
$(this).stop().animate({width:"+=66px",height:"+=66px"},1000);
});
$('div').on('zoomIn',function(){ //缩小
$(this).stop().animate({width:"+=-66px",height:"+=-66px"},1000);
});
$('div').on('DOMMouseScroll',function(ev){
//alert(ev.originalEvent.detail)
if(ev.originalEvent.detail < 0){
$('div').trigger('zoomOut');
}else if(ev.originalEvent.detail > 0){
$('div').trigger('zoomIn');
}
});
})
</script>
<body>
<div></div>
</body>
</html>
