Jinglero

function getElementsByClass(searchClass,node,tag) {
       var classElements = new Array();
       if ( node == null )
               node = document;
       if ( tag == null )
               tag = '*';
       var els = node.getElementsByTagName(tag);
       var elsCant = els.length;
       var cla = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
       for (i = 0, j = 0; i < elsCant; i++) {
               if ( cla.test(els[i].className) ) {
                       classElements[j] = els[i];
                       j++;
               }
       }
       return classElements;
}