getelemsclasstag = function(classname, tag) {
  if (document.getElementsByClassName) {
    var elems = document.getElementsByClassName(classname);
    return elems;
  } else {
    var i = 0; var elems = new Array();
    var tagelems = document.getElementsByTagName(tag);
    for (i=0;i<tagelems.length;i++) {
      if (tagelems[i].className.search(classname) >-1) elems.push(tagelems[i]);
    }
    return elems;
  }
}