dom07.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript">
        function test(){
            alert("this is a function in parent")
        }
        function testCall(){
            //第一种  获取iframe的方式  通过数组下标获取
            //console.log(window.frames[0]);
            //当有名字的时候  可以通过对象的方式去得到
            //console.log(window.frames.iframe1);

            //通过window直接获取   window <==> window.frames
            //console.log(window[0]);
            //console.log(window['iframe1']);
            //console.log(window.iframe1);
            var a = window[0].iframe1();
            alert(a);
        }
        var win;
        function testOpen(){
            win = window.open("iframe2.html","","width=300px,height=400px");
            //console.log(a);

        }

        function testCall1(){
            win.iframe2();
        }
    </script>
    <style>
        iframe{
            width: 400px;
            height: 300px;
            border: 1px solid;
        }
    </style>
</head>
<body>
<input type="button" value="click" onclick="testCall()">
<input type="button" value="open" onclick="testOpen()">
<input type="button" value="call" onclick="testCall1()">
<hr>
<iframe src="iframe1.html" name="iframe1" frameborder="0"></iframe>
<iframe src="iframe2.html" name="iframe2" frameborder="0"></iframe>
</body>
</html>


iframe1.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script>
        function iframe1(){
            alert("iframe1");
            return 123;
        }

        function testCall(){
            //console.log(window);
            window.parent.test();
        }
    </script>

</head>
<body>
<input type="button" value="click" onclick="testCall()">
<h1>this is a iframe 1</h1>
</body>
</html>


iframe2.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script>
function iframe2(){
alert("iframe2");
}

function testCall(){
window.opener.test();
}
</script>
</head>
<body>
<input type="button" value="click" onclick="testCall()">
<h1>this is a iframe 2</h1>

</body>
</html>