makssof

function findFirstChildByClass(element, className) {
    var foundElement = null, found;
    function recurse(element, className, found) {
        for (var i = 0; i < element.childNodes.length && !found; i++) {
            var el = element.childNodes[i];
            var classes = el.className != undefined? el.className.split(" ") : [];
            for (var j = 0, jl = classes.length; j < jl; j++) {
                if (classes[j] == className) {
                    found = true;
                    foundElement = element.childNodes[i];