Return the width of an embedded file:
var x = document.getElementById("myEmbed").width;
Click the button to return the width of the animation.
<!DOCTYPE html> <html> <body> <embed id="myEmbed" src="video.mp4" width="200" height="200" style="border:1px solid"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {//from ww w. ja v a 2 s. c o m var x = document.getElementById("myEmbed").width; document.getElementById("demo").innerHTML = x; } </script> </body> </html>