资 源 简 介
这个程序可以说是对滚动条功能实现比较全面的编成，里面包括了对滚动条的初始化，左右箭头的操作及空白地方的操作-this procedure can be said to be rolling to achieve more comprehensive function of the organization, including the inside of the rolling of the initialization, arrows around the operation and the operation gap
