学学jQuery，实现个小功能练练手
需要用到定时器
html代码如下
<html>
<head>
<title></title>
<script type="text/javascript" src="jquery-1.9.1.min.js"></script>
</head>
<body>
<h2>ShowOrHide</h2> <META http-equiv="content-type" content="text/html;charset=utf8">
<input type="button" name="stop" value="咒立停"/>
<input type="button" name="begin" value="颤抖吧"/>
<div id="song" style="text-align: center; font-size: 100px;width:300px;">
<img id="gala" alt="我爱罗" src="gala.jpg" style="width:300px;height:300px"/>
</div>
<script type="text/javascript">
$(function () {
$("h2").click(function () {
//隐藏或显示标签
$("img#gala").slideToggle();
});
$("img#gala").mouseenter(function(){
window.clearInterval(timerlr);
}).mouseleave(function(){
window.clearInterval(timerlr);//非第一次使用定时器必须先停止，否则会导致时间混乱
timerlr=self.setInterval("move()", global.timespan);
});
$("[name='stop']").click(function(){
window.clearInterval(timerlr);
});
$("[name='begin']").click(function(){
window.clearInterval(timerlr);//非第一次使用定时器必须先停止，否则会导致时间混乱
timerlr=self.setInterval("move()", global.timespan);
});
}); //声明全局变量对象，尽量减少污染
var global = {
timespan: 10,//定时器间隔
vdirect: "down",//垂直滚动方向
hdirect: "right",//水平滚动方向
widthspan: 10,//单次宽度变化
heightspan: 10//单次高度变化
} var timerlr = self.setInterval("move()", global.timespan); function moveright() {
$song = $("div#song");
var offset = $song.offset();
var left = offset.left + global.widthspan;
$song.offset({ left: left, top: offset.top });
}
function movedown() {
$song = $("div#song");
var offset = $song.offset();
var top = offset.top + global.heightspan;
$song.offset({ left: offset.left, top: top });
}
function moveleft() {
$song = $("div#song");
var offset = $song.offset();
var left = offset.left - global.widthspan;
$song.offset({ left: left, top: offset.top });
}
function moveup() {
$song = $("div#song");
var offset = $song.offset();
var top = offset.top - global.heightspan;
$song.offset({ left: offset.left, top: top });
} //进行水平和垂直方向的移动
function move() {
$height=$(window).height();
$song = $("div#song"); //离底部还有10像素的距离时开始回弹
if ($song.offset().top + $song.height() >= $height-10) {
global.vdirect = "up";
}
else if ($song.offset().top <= 10) {
global.vdirect = "down";
}
if (global.vdirect == "down") {
movedown();
}
else if (global.vdirect == "up") {
moveup();
}
if ($song.offset().left + $song.width() >= $(window).width()-10) {
global.hdirect = "left";
}
//离右边界还有10像素距离还是回弹
else if ($song.offset().left <= 10) {
global.hdirect = "right";
}
if (global.hdirect == "right") {
moveright();
}
else if (global.hdirect == "left") {
moveleft();
}
}
</script>
</body>
</html>
代码地址：
哥们用的图片，话说火影写的越来越没意思了