##Piao.js##
Function : make position-absolute html element float when user mouse moving.
Demo : http://yudongmao.sinaapp.com/demo/piao/example/demo1.html
Useage
###Step1
Import jquery.js and piao.js
###Step2
parent element call piao function,children(which you want them to float) as an ARRAY parameter
Example:
$('.out').piao([ { item : $('.ball1'), xrate : 10, yrate :50, invert : true }, { item : $('.ball2'), xrate : 20, yrate :5, stop:true } ])
note1: parameter "invert" and "stop" are optional;
note2: parameter "invert" and "stop" are optional;