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我想停止程序流程，直到收到來自子窗口的輸入。對於父窗口java腳本中的父子窗口
代碼：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>MainPage</title>
<SCRIPT LANGUAGE="JavaScript">
function openpage(){
window.open("ok.htm","Warning",'fullscreen=0,height=150,width=300,left=500,location=0,menubar=0,resizable=0,scrollbars=0,status=0,titlebar=0,toolbar=0,top=200');
//this the place i want my program to wait till i get any input that is any change in document.fm.w.value form my child window///////
alert(document.fm.w.value);/// alert should contain the new value acorrding to selection of button in child window////
}
</SCRIPT>
</head>
<body>
<form name="fm">
<input type="hidden" size="40" id="w" value="wwww">
<input type="button" value= "press" id="q" name= "q" onclick= "openpage();">
</form>
</body>
</html>
子窗口代碼：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Warning</title>
<SCRIPT LANGUAGE="JavaScript">
function ReturnToMainPage1() {
window.opener.document.fm.w.value = "X"
//self.close();
}
function ReturnToMainPage2() {
window.opener.document.fm.w.value = "O"
self.close();
}
</SCRIPT>
</head>
<body>
<form name="fm">
<table id="MessageTable" width="100%">
<tr>
<td align="center">
<input type="button" value= "OK" id="Latest_Version" onclick= "ReturnToMainPage1();"></td>
<td>View Latest Released Version</td>
</tr>
<tr>
<td align="center"><input type="button" value= "OK" id="Older_Version" onclick= "ReturnToMainPage2();"></td>
<td>Continue Viewing Obsolete Version</td>
</tr>
</table>
</form>
</body>
</html>