例1: overflow的使用
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> body{margin:0;} .left{ float: left; } .right{ float: right; } .pg-header{ position: fixed; top: 0; left: 0; right: 0; background-color: #499ef3; height: 48px; } .pg-content .meun{ position: fixed; top: 48px; left: 0; bottom: 0; width: 200px; background-color: #dddddd; } .pg-content .content{ position: fixed; top: 48px; right: 0; bottom: 0; left: 200px; background-color: #b0b0b0; overflow: auto; } </style> </head> <body> <div class="pg-header"></div> <div class="pg-content"> <div class="meun left">a</div> <div class="content left"> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> <p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p><p>ddddd</p> </div> </div> <div class="pg-footer"></div> </body> </html>