Loading Image into document.body Background
===

I'm attempting to pull an image (in this case, `/camera/frame`, which is a known-good JPG), and load it as the background of my `document.body`.

Here's my code thus far:

    var backgroundImage = new Image();
    backgroundImage.onload = function ()
    {
        console.log("onload");
        document.body.style.backgroundImage = this.src;
    };
    
    backgroundImage.src = 'camera/frame'; 

`"onload"` prints as expected, and this.src prints out the full URL to `/camera/frame`, however `document.body.style.backgroundImage` remains `""`.