關鍵代碼是：#topmenu_keleyi_com{position:fixed;left:0px;right:0px;width:706px;margin-left:auto;margin-right:auto;}
附完整代碼：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>使position:fixed的p置中-柯樂義</title> <style type="text/css"> #topmenu_keleyi_com{position:fixed;left:0px;right:0px;width:706px;margin-left:auto;margin-right:auto;top:100px;height:50px;background-color:Red;} #topmenu_keleyi_com li{float:left; list-style:none; margin-right:1px; width:116px; background-color:#e0f0e0; } #topmenu_keleyi_com ul{ margin:0px;padding:0px;} body{margin:0px;} </style> </head> <body> <p id="topmenu_keleyi_com"> <ul><li><a href="http://www.keleyi.com/menu/net/" target="_blank">.NET</a></li> <li><a href="http://www.keleyi.com/menu/javascript/" target="_blank">Javascript</a></li> <li><a href="http://www.keleyi.com/menu/jquery/" target="_blank">jQuery</a></li> <li><a href="http://www.keleyi.com/menu/csharp/" target="_blank">C#</a></li> <li><a href="http://www.keleyi.com/menu/other/" target="_blank">其他</a></li> <li><a href="http://www.keleyi.com/" target="_blank">首頁</a></li></ul> position:fixed的p的置中效果,改變頁面的寬度看看。 </p> </body> </html>
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