javascript

Example of a js operation on an iframe parent child form

The parent form gets the iframe

Window. IframeId

The iframe gets the parent window

Window. The parent

The parent. HTML


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function btnFn(){
window.subWin.test();
}
function get(name){
return document.getElementById(name);
}
</script>
</head>
<body>
<input id="name" type="text" value="222">
<input type="button" id="btn" value=" Click on the " onclick="btnFn();"><br/>
<br/><br/>
<iframe src="sub.html" id="subWin"
name="subWin" width="100%" marginwidth="0" height="100%"
marginheight="0" scrolling="Yes" frameborder="0" valign="middle"
resize="no" style="display: block;border:3px solid red;"></iframe>

</body>
</html>

Sub. HTML


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" >
function test(){
alert(window.parent.get("name").value);//Results: 222
}

</script>
</head>
<body>
 I am the content of the form
</body>
</html>