iframe2016/4/12

js操作iframe

contentWindow
在服务器环境下测试
contentDocument
二种方法的区别
子级iframe修改父级元素内容
window.parent
window.top与window.parent的区别

window.top:是当前文件最顶端的那个文件，window.parent:是当前文件上面的文件

<!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=utf-8" />

<title>无标题文档</title>

</head>

<body>

<div style="width:200px; height:200px; background:red;"></div>

</body>

</html>

上面是iframe4

下面是iframe5

<!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=utf-8" />

<title>无标题文档</title>

</head>

<body>

<div style="width:200px; height:400px; background:green;"></div>

</body>

</html>

　　父文件

<!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=utf-8" />

<title>无标题文档</title>

<script>

window.onload = function(){

    var aInput = document.getElementsByTagName('input');

    var oIframe = document.getElementById('iframe1');

    function changeHeight(){

        setTimeout(function(){

            oIframe.height = oIframe.contentWindow.document.body.offsetHeight;

        },100);//防止转向文件与changeHeight函数同时运行

    }

    changeHeight();

    aInput[0].onclick = function(){

        oIframe.src = 'iframe4.html';

        changeHeight();

    };

    aInput[1].onclick = function(){

        oIframe.src = 'iframe5.html';

        changeHeight();

    };

};

</script>

</head>

<body>

<input type="button" value="切换1" />

<input type="button" value="切换2" />

<iframe id="iframe1" src="iframe4.html" scrolling="no"></iframe>

</body>

</html>

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