<!DOCTYPE html>
<html>
<body>
<p>Click the button to loop through the frames on this page, and change the location of every frame to "w3schools.com".</p>
<button onclick="myFunction()">Try it</button>
<br><br>
<iframe src="http://www.cnn.com"></iframe>
<iframe src="http://www.bbc.com"></iframe>
<iframe src="http://www.nytimes.com"></iframe>
<script>
function myFunction() {
var frames = window.frames;
var i;
for (i = 0; i < frames.length; i++) {
frames[i].location = "http://www.w3schools.com";
}
}
</script>
</body>
</html>