常用的二列布局,外容器Div定義class為container, 包含class分別為left 和main兩個子DIV,下邊是class為foot的Div 當我們想在container和foot之間加一點間隙時,fifefox卻發起了脾氣 代碼如下:<!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>測試頁</title><style type="text/css">.container{}{border:1px #333 solid; width:600px; margin-bottom:20px;}.container .left{}{width:300px; float:left; height:100px; background:#f60;}.container .right{}{width:300px; float:left; height:300px; background:#ccc;}.foot{}{clear:both;width:600px;height:20px; background:#3D78B6;border:1px solid #000000;}</style></head><body><div class="container"> <div class="left"></div> <div class="right"></div></div><div class="foot"></div></body></html> 以上代碼在IE6中能正常顯示,但是在firefox中container和footer之間沒有間隙,也就是說margin-bottom:20沒起作用 解決變法: 修改container,代碼如下:.container{}{overflow:hidden;border:1px #333 solid; width:600px; margin-bottom:20px;} 區別就在這一句 转载于:https://www.cnblogs.com/ywkpl/archive/2008/06/18/1224555.html