利用JavaScript取得客户端分辨率 ,利用取得的值设置iframe: <script language="javascript" type="text/javascript">function init()...{ var clientwidth=window.screen.width; var clientheight=window.screen.height; document.getElementById("IFRAME1").style.width = (clientwidth - 160); document.getElementById("IFRAME1").style.height = clientheight;} 加入<body>: <body onload="init()"> OK