document.getElementsByClassName = function(clsName)
{
    var retVal = new Array();
    var elements = document.getElementsByTagName("*");
    for(var i = 0;i < elements.length;i++)
    {
        if(elements[i].className.indexOf(" ") >= 0)
        {
            var classes = elements[i].className.split(" ");
            for(var j = 0;j < classes.length;j++)
            {
                if(classes[j] == clsName)
                {
                    retVal.push(elements[i]);
                }
            }
        }
        else if(elements[i].className == clsName)
        {
            retVal.push(elements[i]);
        }
    }
    return retVal;
}

function getElementsByClassName(noeud, clsName)
{
    var retVal = new Array();
    var elements = noeud.getElementsByTagName("*");
    for(var i = 0;i < elements.length;i++)
    {
        if(elements[i].className.indexOf(" ") >= 0)
        {
            var classes = elements[i].className.split(" ");
            for(var j = 0;j < classes.length;j++)
            {
                if(classes[j] == clsName)
                {
                    retVal.push(elements[i]);
                }
            }
        }
        else if(elements[i].className == clsName)
        {
            retVal.push(elements[i]);
        }
    }
    return retVal;
}