[twolf]

function getElementsByClass(cls, node, tag)
{
    if(document.getElementsByClass) return document.getElementsByClass(cls, node, tag); 
    if(! node) node = document;
    if(! tag)  tag  = '*';
    var them = node.getElementsByTagName(tag),
        rez  = [];
    for(var notI = 0; notI < them.length; ++notI)
        if(them[notI].className == cls) rez.push(them[notI]);
    return rez;
}