Return the width of an image:
var x = document.getElementById("myImg").width;
Click the button to display the width of the image.
<!DOCTYPE html> <html> <body> <img id="myImg" src="image1.png" width="100" height="98"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/* w ww. j a v a2 s . c om*/ var x = document.getElementById("myImg").width; document.getElementById("demo").innerHTML = x; } </script> </body> </html>