jQuery.fn.autoResize = function() {

    // remove enforced with / height (by CSS and/or HTML attributes)

    this.css("width", "auto").css("height", "auto");

    this.removeAttr("width").removeAttr("height"); // Remove

    // compute image size / max allowed size to fit screen

    var imgHSize = this.width();

    var maxHSize = $(window).width() - ($(document).width() - imgHSize);

    var imgVSize = this.height();

    // we don't mind if content in [content]footer moved out of the screen

    var maxVSize = $(window).height() - ($(document).height() - imgVSize) + $('#footer').height() + $('#contentfooter').height();

    if (maxHSize > 0 && maxVSize > 0) {

        // if image don't fit screen, set width or height so that

        // browser keep img ratio, ensuring the other dimension will

        // also fit the screen

        if (imgHSize > maxHSize && ((imgVSize / imgHSize) * maxHSize) <= maxVSize) {

            this.css("width", maxHSize);

        } else if (imgVSize > maxVSize && ((imgHSize / imgVSize) * maxVSize) <= maxHSize) {

            this.css("height", maxVSize);

        }

        else {

            // image already fit in screen, don't scale it up

        }

    } else {

        // can't fit image in, don't do anything

    }

};

$(document).ready(function() {

        $("img.contentimage").load(function() {$(this).autoResize()});

});