Example of a js operation on an iframe parent child form

2020-03-30 03:00:54
OfStack

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>