function shadow() {
    var divs = document.getElementsByTagName("div");
    for(var i = 0; i < divs.length; i++) {
        var the_class = divs[i].className;
        if (the_class == "shadow" || the_class == "image_right_aligned shadow") {
            var div1 = document.createElement('div');
            var div2 = document.createElement('div');
            var div3 = document.createElement('div');
            var div4 = document.createElement('div');
            var image = divs[i].getElementsByTagName('img');

            divs[i].appendChild(div1);
            div1.appendChild(div2);
            div2.appendChild(div3);
            div3.appendChild(div4);
            div4.appendChild(image[0]);
        }
    }
}

window.onload = function() {
	shadow();
}