JQuery拖拽元素改变大小尺寸实现代码

<script type="text/javascript">
/*
* jQuery.Resize by wuxinxi007
* Date: 2011-5-14
*/
$(function(){
//绑定需要拖拽改变大小的元素对象
bindResize(document.getElementById('test'));
});

function bindResize(el){
//初始化参数
var els = el.style,
//鼠标的 X 和 Y 轴坐标
x = y = 0;
$(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>