When you first start learning to do a web page, you will definitely worry because of the positioning of the layer, because in the web page, it is precisely defined the coordinate value of the layer, but the size of the browser changes, the dislocation of the display will cause the layer's misplacement. My way is to determine the exact location of the layer with a layer relative to the table. Because the location of the table is fixed. The specific approach is: Defining the ID of the layer to be positioned is UDIV, defining the ID of the fixed form to TableBody. Add a function between the
of the page where the page is located