How to replace hex bg colors to use images instead in JavaScript?

[Nulll]

Hi there,

I have the following code lines in my JavaScript code:

var colors = ["#F08", "#0B8", "#04F", "#FD0", "#808", "#F20"];

This sets the bg colors of my divs. This var is only used here:

function activateItems(callback) {
 var itemsActivated = false;
 for (var i=0;i<cfg.rows;++i) for (var j=0; j<cfg.cols; ++j) {
 var item = itemAt(i,j);
 if(!item) continue;
 if (item.deleted>0) {
 item.style.background=colors[Math.floor(Math.random()*colors.length)];
 itemsActivated = true;
 }
 }
 if (itemsActivated) 
 animateAppear(callback ? callback : findPatterns);
}

and here:

function animateDecor() {
 if(state == 'init' || state == 'game') return;
 for (var i=0;i<cfg.rows;++i) for (var j=0;j<cfg.cols;++j) {
 var item = document.getElementById("decor_"+i+"_"+j)
 if(!item) continue;
 item.style.background=colors[Math.floor(Math.random()*colors.length)];
 }
 animation = setTimeout(animateDecor, 120); 
}

This all works great, only I don't want to use hex (#) colors as background, I want to use images. These are located for example in: images/blue.png, images/red.png, etc. But how to pull this off? Tried several stuff including backgroundImage:url and so, but these where unsuccessful. I am just starting to learn this so some corrected code examples with comments will really help.

I think the solution is very simple, but I just don't see it (yet)...

Many thanks