Set a background image of a specific <div> element:
document.getElementById("myDiv").style.backgroundImage = "url('background1.png')";
<!DOCTYPE html> <html> <head> <style> div {/* w w w.j a va 2 s . c o m*/ width: 400px; height: 400px; border: 1px solid black; } </style> </head> <body> <h1>Hello World!</h1> <div id="myDiv">This is a div element.</div> <br> <button type="button" onclick="myFunction()">Set the background image of div</button> <script> function myFunction() { document.getElementById("myDiv").style.backgroundImage = "url('background1.png')"; } </script> </body> </html>