function getElementsByClassName(node, classname) {
    var a = [];
    var re = new RegExp('\\b' + classname + '\\b');
    var els = node.getElementsByTagName("*");
    for(var i=0,j=els.length; i<j; i++)
        if(re.test(els[i].className))a.push(els[i]);
    return a;
}


function shadowText(originalClass, shadowClass) {
    if (typeof disableShadowedText != 'undefined') return;

    var els = getElementsByClassName(document, originalClass);
		for (i=0;i<els.length;i++) {
			var text = els[i].innerHTML;
			els[i].className = shadowClass;
			els[i].innerHTML = text + '<div class="'+originalClass+'" style="position:absolute;">' + text + '</div>';
		}
}

$(document).ready(function() {
  shadowText('zag', 'zag_shadow');
});