jQuery页面右下角浮动窗口代码，内容可隐藏，可鼠标拖动移到任意位置，点击可收缩到浏览器窗口的右下角。-JQuery page of the lower right corner of the floating window code, the contents can be hidden, can be moved to the mouse to move to any location, click on the bottom right corner of the browser win