漂亮的ToolTip效果.使用者将鼠标移动到网页控件上就会出现自定义的提示信息，鼠标移开后提示信息消失。可用来指导用户进行正确操作。-ToolTip beautiful effect. User moves the mouse controls will appear on the page custom message, the message disappears mouse away. Can be used to guide the user for proper operation.