鼠标显示层ajax调josn的实例，根据鼠标定位显示层读取JOSN数据，提示层内显示的内容在text.html内，通过Josn来调用，使用了jquery插件。-Mouse shows an example layer ajax tune josn, the layer read JOSN data based on mouse position display, the contents of the display prompts layer within text.html, called by Josn, using a jquery plugin.