Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script> function changeSrc() { document.getElementById("myImage").src="hackanm.gif"; } </script> </head> <body> <img id="myImage" src="compman.gif" width="107" height="98"> <br><br> <input type="button" onclick="changeSrc()" value="Change image"> <p><b>Note:</b> The src property can be changed at any time. However, the new image inherits the height and width attributes of the original image, if not new height and width properties are specified.</p> </body> </html>
Result:
W3Schools.com - Try it yourself