使用JavaScript可以達成這樣的需求
首先來製作Parent.htm
<!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>
<title>Parent Frame</title>
<style type="text/css">
#PT1
{
width: 129px;
}
#PT2
{
width: 168px;
}
</style>
</head>
<body>
<div>
Send to Child:
<br />
<input type="text" id="PT1" size="20" />
<input type="button" value="Send" onclick="SendMsgToChild()" />
<br />
<br />
Receive From Child:
<br />
<input type="text" id="PT2" size="20" /><br />
<br />
<hr />
<iframe src="Child.htm" id="Childframe" width="250px" height="180px"></iframe>
</div>
</body>
</html>
<script type="text/javascript">
function SendMsgToChild() {
document.getElementById('Childframe').contentWindow.ReceiveMsgFromParent(document.getElementById('PT1').value);
}
function ReceiveMsgFromChild(message) {
document.getElementById('PT2').value = message;
}
</script>
看到裡面有一個<IFrame>的控制項，這邊決定子視窗的路徑
id="Childframe"很重要，要給他id，之後才能找到他
按鈕的觸發事件就會傳送訊息給Child.htm，會去呼叫他的ReceiveMsgFromParent()
document.getElementById('Childframe').contentWindow.ReceiveMsgFromParent(document.getElementById('PT1').value);ReceiveMsgFromChild()是接收來自Child.htm的訊息
接著來看 Child.htm
<!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>
<title>Child Frame</title>
<style type="text/css">
#CT2
{
width: 129px;
}
#CT1
{
width: 168px;
}
</style>
</head>
<body>
<div>
Receive From Parent:
<br />
<input type="text" id="CT1" size="20" /><br />
<br />
Send to Parent:
<br />
<input type="text" id="CT2" size="20" />
<input type="button" value="Send" onclick="SendMsgToParent()" />
<br />
</div>
</body>
</html>
<script type="text/javascript">
function SendMsgToParent() {
parent.ReceiveMsgFromChild(document.getElementById('CT2').value);
}
function ReceiveMsgFromParent(message) {
document.getElementById('CT1').value = message;
}
</script>
這邊可以看到ReceiveMsgFromParent()，這個就是給Parent呼叫的
按鈕的觸發事件會去呼叫"Parent"的Function
這邊的Parent是關鍵字，會直接導向呼叫這IFrame的那一頁
不用知道父視窗的id
parent.ReceiveMsgFromChild(document.getElementById('CT2').value);假設有多層的IFrame呼叫"祖父"的那一頁
只要這樣寫
parent.parent.ReceiveMsgFromChild(document.getElementById('CT2').value);Demo:
