2010-09-26 10:06 jq拖动(ui.draggable.packed.js,ui.core.packed.js)
http://jquery-api-zh-cn.googlecode.com/svn/trunk/jQuery%20UI/draggable.html
$(document).ready(function(){
$(".block").draggable({
//helper:"clone",//拖动时克隆,默认是original
//axis:"x",//定义拖动方向
containm