<!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> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>大庆师范学院</title> <style type="text/css"> body{margin:0; padding:0} #top{width:auto; height:110px; background:#777777;} #main{ width:1010px; height:auto; margin:0 auto; background:#AAAAAA;} #left{width:750px; height:600px; float:left; background:#33FF99;} #sub_u{width:750;} #sub_d{} #right{ width:260px; height:600px; float:right; background:#00FF00;} #foot{ width:1010px; height:70px; background:#555; margin:0 auto; } </style> </head> <body> <body> <div id="top" ></div> <div id="main"> <div id="left"> <div id="sub_u"></div> <div id="sub_d"></div> </div> <div id="right"></div> </div> <div id="foot"></div> </body> </html> 上边为代码,设置的ID为“foot”的块状元素无法显示怎么改????
侠客岛的含笑
我很不愉快