function replaceMissingImages()
{
    for (var i=0; i<document.images.length; i++)
    {
        if(document.images[i].src.indexOf("http://content.travimp.com/images") != -1)
        {
//            img = new Image();
//            img.src = document.images[i].src;            
//            if (img.height == 0)
//            {
//                document.images[i].src = DEFAULT_BROKEN_IMAGE;                
//            }
            if (!IsImageOk(document.images[i])) 
            {
                //document.images[i].style.visibility = "hidden";
                document.images[i].src = DEFAULT_BROKEN_IMAGE;  
            }
        }
    }
}

function IsImageOk(img) {
    // During the onload event, IE correctly identifies any images that
    // weren't downloaded as not complete. Others should too. Gecko-based
    // browsers act like NS4 in that they report this incorrectly.
    if (!img.complete) {
        return false;
    }

    // However, they do have two very useful properties: naturalWidth and
    // naturalHeight. These give the true size of the image. If it failed
    // to load, either of these should be zero.
    if (typeof img.naturalWidth != "undefined" && img.naturalWidth == 0) {
        return false;
    }

    // No other way of checking: assume it's ok.
    return true;
}