Javascr ipt实现网页上点击按钮显示和隐藏一个层-Javascr ipt realization of the page click the button to display and hide a layer

可以打开时钟,可以看到系统的日期和时间,再按一下按纽可以隐藏.-Can turn the clock, we can see that the system date and time, and then click button to hide.

在窗体中摆放三个单选钮，如果某个按钮被选中，则将其隐藏，其他按钮变为可见。-in the form of placing three radio button, if a button is selected, it will hide the other buttons become visible.

此代码内容为自动隐藏的弹性返回顶部JS代码，超出首屏范围，即会出现TOP按钮，否则自动隐藏。有弹性返回顶部的动画效果。-The content of this code to automatically hide the flexibility to return to the top of the JS code, beyond the scope of the first screen that appears TOP button, or automatically hide. Flexi