Just make a new image via javascript, and only show the image after the onload has fired. This will make sure you don't see any partial rendering of the image.

Live Demo

    var curImg = new Image();



    curImg.src = url to your image;

    curImg.onload = function(){

        // do whatever here, add it to the background, append the image ect.

        imgHolder.appendChild(curImg);   

    }