父级：parent.html
调用孩子方法：fuji.window.functionName();
<!doctype html>
<html>
<head>
<script type="text/javascript">
function say() {
alert("parent.html------>I'm at parent.html");
}
function callChild() {
//document.frames("myFrame").f1();
myFrame.window.say();
}
</script>
</head>
<body>
<input type=button value="调用child.html中的函数say()" onclick="callChild()">
<iframe name="fuji" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="child.html"></iframe>
</body>
</html>
父级：child.html
调用孩子方法：parent.functionName();
<!doctype html>
<html>
<head>
<script type="text/javascript">
function say() {
alert("child.html--->I'm at child.html");
}
function callParent() {
parent.say();
}
</script>
</head>
<body>
<input type=button value="调用parent.html中的say()函数" onclick="callParent()">
</body>
</html>
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