01.<html>
02.<head>
03. <title></title>
04. <script language="javascript" type="text/javascript">
05. function Button1_onclick() {
06. window.alert(window.frames[0].document.location.search);
07. }
08. </script>
09.</head>
10.<body>
11. <input id="Button1" type="button" value="get iframe's query string" onclick="return Button1_onclick()" />
12. <iframe src="myfile.htm?sid=1234"></iframe>
13.</body>
14.</html>
