父窗口：
<!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=gb2312" />
<title>無標題文檔</title>
</head>
<body>
<input type="button" id="test" οnclick="window.showModalDialog('1.htm',window,'');" value="點我">
</body>
</html>
子窗口：
<!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=gb2312" />
<title>無標題文檔</title>
<script language="javascript">
// 子窗口給父窗口賦值(模態)
function test_parent() {
// 獲得父窗口的對象
window.returnValue='aaa';
window.close(); //關閉模態窗口
}
</script>
</head>
<body>
<script language="javascript">
function test()
{
window.dialogArguments.document.all["test"].value = document.all["txt_Value"].value;
window.close();
}
</script>
<input id="txt_Value">
<input type="button" οnclick="test();" value="提交">
</body>
</html>