Changing DIV background with JavaScript?

[realistic]

I know there is a way to change a DIV HTMT text using JavaScript, but is there any way to change the DIV background image? Or background color?

[menlawre]

// change bg image

document.getElementById("div1").style.backgroundImage = "url(someImage.jpg)";

// change bg color

document.getElementById("div2").style.background = '#000000';