<!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>一列布局</title><style type="text/css">body{ margin:0; padding:0; font-size:30px}div{ text-align:center; font-weight:bold}.main,.footer{ width:960px; margin:0 auto}.head{ width:100%; height:100px; background:#ccc}.main{ height:600px; background:#FCC;margin 0 auto}.sub_l{width:200px;height:600px;background:#63F;float:left;margin-top:-600px}.left{width:190px;height:600px;background:#F99;float:left;margin-top:-600px}.sub_r{width:200px;height:600px;background:#FC3;float:right;margin-top:-600px}.right{width:190px;height:600px;background:#6F9;float:right;margin-top:-600px}.footer{ height:50px; background:#9CF;margin 0 auto}</style></head><body><div class="head">head</div><div class="main">main</div><div class="sub_l">sub_l</div><div class="sub_r">sub_r</div><div class="left">left</div><div class="right">right</div><div class="footer">footer</div></body></html>哪里出錯了？
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