$(document).ready(function () {
    $('.boxgrid.slidedown').hover(function () {

        var imgHeight = $(this).children("img").height();
        var imgWidth = $(this).children("img").width();
        var padding = $(this).children("div").css('padding-top').replace("px", "");

        var diff = parseInt(padding);

        imgHeight -= diff;
        imgWidth -= diff;

        $(this).children("div").css({
            'height': imgHeight + 'px',
            'width': imgWidth + 'px'
        });

        /*$(this).children("img").css("opacity", "0.5");*/
        $(this).children("div").animate({ opacity: 1 }, 400);

    }, function () {
        var imgHeight = $(this).children("img").css("height");
        /*$(this).children("img").css("opacity", "1");*/
        $(this).children("div").animate({ opacity: 0 }, 400);

    }
    );

});