function imgLoad() {
    var imgID = 0;
    for (var i = 0; i < document.images.length; i++) {
        var newImg = new Image()
        newImg.id = "img" + i;
        newImg.onerror = function() {
            imgErr(this.id.substring(3,4));
            newImg.onerror = "";

            return true;
        }
        newImg.src = document.images[i].src;
        newImg = null;
    }
}

function imgErr(imgID) {
    document.images.item(parseInt(imgID)).src = "assets/img/noImg.gif";
}