function addEvent(elm, evType, fn, useCapture)
{
  if (elm.addEventListener) {
    elm.addEventListener(evType, fn, useCapture);
    return true;
  }
  else if (elm.attachEvent) {
    var r = elm.attachEvent('on' + evType, fn);
    return r;
  }
  else {
    elm['on' + evType] = fn;
  }
}


function cancelClick(e) {
  if (window.event && window.event.returnValue) {
    window.event.returnValue = false;
  }
  if (e && e.preventDefault) {
    e.preventDefault();
  }
}
function cancelClickSafari() {
  return false;
}