以饼形图显示当前内存使用情况，饼形图的颜色可调，另外可以显示当前鼠标位置。-to pie-shaped chart shows the current memory usage of the pie-shaped map of adjustable colors, it also shows the current mouse location.

记录鼠标相对拖放对象的位置,网页模块化思想，类似google个性首页代码。-Record the location of the mouse relative to drag and drop objects, web modularization, similar to the google personalized home page code.