width:100%, you can't let the DIV occupy the entire screen_html/css_WEB-ITnose

There are three divs: top, middle and bottom. How to make them fill the screen?

 <div style="width:100%;background:#ffffff;height:100px;border:0;padding:0;margin:0;text-decoration:none;"></div> <div style="width:100%;background:red;height:100px;border:0;padding:0;margin:0;text-decoration:none;"></div>  <div style="width:100%;background:yellow;height:100px;border:0;padding:0;margin:0;text-decoration:none;"></div>

Reply to discussion (solution)

html,body{margin:0;pading:0;}

Whether the div container occupies the page 100%? Use body 's padding: 0 to see first. What is the layout of your page? It's best to send a picture.