/* Getters */
function gId(id) {return document.getElementById(id);}
function gTag(node, tag) {return node.getElementsByTagName(tag);}

function gClass(node, classname) /* from Snook.ca */
{
    var a = [];
    var re = new RegExp('\\b' + classname + '\\b');
    var els = gTag(node, '*');
    for(var i=0,j=els.length; i<j; i++)
        if(re.test(els[i].className))a.push(els[i]);
    return a;
}