$(window).bind('load', function() {
    scaleImageTextDivs('div.imgLeft');
    scaleImageTextDivs('div.imgRight');
    scaleImageTextDivs('div.imgWithTxt');
});

function scaleImageTextDivs(divClassName) {
    $(divClassName).each(function() {
        var img = $(this).find('img');
        if (img != null && img.width() > 0) {
            $(this).width(img.width());
        }
    });
}