完整代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>jquery 版“元素拖拽改变大小”原型 - www.plchome.org </title>
<script type="text/javascript" src="/pmedia/jquery/jquery-1.11.1.min.js"></script>
<script type="text/javascript">
/*
* jQuery.Resize
* Date: 2014-12-04
* /
*/
$(function () {
//绑定需要拖拽改变大小的元素对象
bindResize(document.getElementById('kel'+'eyi'));
});
function bindResize(el) {
//初始化参数
var els = el.style,
//鼠标的 X 和 Y 轴坐标
x = y = 0;
//邪恶的食指
$(el).mousedown(function (e) {
//按下元素后，计算当前鼠标与对象计算后的坐标
x = e.clientX - el.offsetWidth,
y = e.clientY - el.offsetHeight;
//在支持 setCapture 做些东东
el.setCapture ? (
//捕捉焦点
el.setCapture(),
//设置事件
el.onmousemove = function (ev) {
mouseMove(ev || event)
},
el.onmouseup = mouseUp
) : (
//绑定事件
$(document).bind("mousemove", mouseMove).bind("mouseup", mouseUp)
)
//防止默认事件发生
e.preventDefault()
});
//移动事件
function mouseMove(e) {
//宇宙超级无敌运算中...
els.width = e.clientX - x + 'px',
els.height = e.clientY - y + 'px'
}
//停止事件
function mouseUp() {
//在支持 releaseCapture 做些东东
el.releaseCapture ? (
//释放焦点
el.releaseCapture(),
//移除事件
el.onmousemove = el.onmouseup = null
) : (
//卸载事件
$(document).unbind("mousemove", mouseMove).unbind("mouseup", mouseUp)
)
}
}
</script>
<style type="text/css">
#plcxue{
position:absolute;
top:0;left:0;
width:200px;
height:100px;
background:#f1f1f1;
text-align:center;
line-height:16px;
border:1px solid #CCC;
cursor:move;
}
</style>
</head>
<body>
<div id="plcxue">按住本灰色区域并拖拽.<a href="/a/bjad/yy8jnwqj.htm" target="_blank">原文</a>.本效果支持各种浏览器，入Chrome,FireFox,IE,Opera等</div>
</body>
</html>