<html xmlns="http://www.w3.org/1999/xhtml" ><head> <title>Untitled Page</title>
<script language="javascript">
// left 和 main 分别是框架的名称或者是ID //方法一：
function openwindow(){ 
window.open("Default4.aspx","left"); window.open("Default3.aspx","main"); 
} //方法二： function openwindows(top,bottom){ parent.document.all.left.src = top; parent.document.all.main.src = bottom; 
} </script></head><body><a href="#" onclick="openwindow();">open</a> <p><a href="#" onclick="openwindows('Default4.aspx','Default3.aspx')">left</a></p></body></html>