קוד:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function youtube(url)
{
var point = url.indexOf("?v=");
url = url.substring(point + 3, url.length);
url = "http://www.youtube.com/embed/" + url;
document.getElementById("demo").innerHTML = url;
}
</script>
</head>
<body>
<p id="demo">http://www.youtube.com/watch?v=HIRNdveLnJI</p>
<button type="button" onclick="youtube('http://www.youtube.com/watch?v=HIRNdveLnJI')">get youtube url</button>
</body>
</html>
תהנה ..