Summary of 4 methods to make div floating layer, scroll bar move and keep position unchanged_javascript skills

The div remains at the top and the scroll bar scrolls, but the div is still at the top! Upload the source code directly:

Method 1:

Copy the code The code is as follows:

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< br>











< ;br>





















< br>


































<























< br>











< ;br>

方法二：

复制代码 代码如下:

 
 

 


















 


















 


















 


















 

  居中的层

方法三：

复制代码 代码如下:

 
 

 居中的层
 

方法四：[采用css来居中]

复制代码 代码如下:

始终在中间