<html> <head> <title> 元素居中 </title> <style> body{ margin:0;padding:0;height:100%;} </style> </head> <body> <table width= "100% " height= "100% " align= "center "> <tr> <td align= "center "> 要居中的元素 </td> </tr> </table> </body> </html>