// core extensions
Array.prototype.remove=function(s){
  var i = this.indexOf(s);
  if(i != -1) this.splice(i, 1);
}

// tiny mce callbacks
function callbackCleanContent(type, value) {
  value = value.replace("<p><br /></p>", "");
  value = value.replace("<p>&nbsp;</p>", "");
  alert(value);
  return value;
}

Event.observe(window, "load", function() {
  if($("keywords")) {
    $("keywords").observe("focus", function(e) {
      $("keywords").clear();
    });

  }
})