jquery鼠标经过图片抖动特效代码

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以下是 jquery鼠标经过图片抖动特效代码的示例演示效果:

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部分效果截图:

HTML代码(index.html):

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>jquery鼠标经过图片抖动</title>
<style type="text/css">
<!--
ul{list-style:none;margin:0;padding:0;}
ul li{vertical-align:bottom;}
.img_box { width:900px; height:150px; margin:0px auto;}
.img_box li{ width:200px; float:left; height:135px; border:1px solid #eee; padding:3px; margin-left:8px;}
body {
	margin-top: 165px;
}
-->
</style>
<script type="text/javascript" src="js/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="js/jump.js"></script>
<script type="text/javascript">
$(function(){
	 $("#ul img").each(function(k,img){
		new JumpObj(img,10);
		//第一个参数代表元素对象
		//第二个参数代表抖动幅度
	});
});
</script>

</head>
<body>
<div class="img_box">
    <ul id="ul">
        <li><a href="#"><img src="images/01.jpg"/></a></li>
        <li><a href="#"><img src="images/02.jpg"/></a></li>
        <li><a href="#"><img src="images/03.jpg"/></a></li>
        <li><a href="#"><img src="images/04.jpg"/></a></li>
    </ul>
</div>
</body>
</html>

JS代码(jump.js):

function JumpObj(elem,range,startFunc,endFunc){
	var curMax = range = range || 6;
	startFunc = startFunc || function(){
}
;
	endFunc = endFunc || function(){
}
;
	var drct = 0;
	var step = 1;
	init();
	function init(){
	elem.style.position = 'relative';
	active()}
function active(){
	elem.onmouseover = function(e){
	if(!drct)jump()}
}
function deactive(){
	elem.onmouseover = null}
function jump(){
	var t = parseInt(elem.style.top);
	if (!drct) motionStart();
	else{
	var nextTop = t - step * drct;
	if (nextTop >= -curMax && nextTop <= 0) elem.style.top = nextTop + 'px';
	else if(nextTop < -curMax) drct = -1;
	else{
	var nextMax = curMax / 2;
	if (nextMax < 1){
	motionOver();
	return;
}
curMax = nextMax;
	drct = 1;
}
}
setTimeout(function(){
	jump()}
,200 / (curMax+3) + drct * 3);
}
function motionStart(){
	startFunc.apply(this);
	elem.style.top='0';
	drct = 1;
}
function motionOver(){
	endFunc.apply(this);
	curMax = range;
	drct = 0;
	elem.style.top = '0';
}
this.jump = jump;
	this.active = active;
	this.deactive = deactive;
}

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