function highlight(target) {
  target.className=target.className + 'Highlight';
}
function restorelight(target) {
  target.className=target.className.substring(0,target.className.length - 9);
}

function showById( id) {
  var item = document.getElementById( id );
  if ( item.style.visibility != 'visible' ) {
    item.style.visibility = 'visible';
  }
}

function hideById( id) {
  var item = document.getElementById( id );
  if ( item.style.visibility != 'hidden' ) {
    item.style.visibility = 'hidden';
  }
}

var winpops = null;
function popupMovie(name, width, height){
  var popurl="movies/" + name + ".html";
  if ( winpops != null ) {
    winpops.close();
  }
  winpops=window.open(popurl,'',"top=100,left=100,width=" + ( width ? width : "400" ) + ",height=" + ( height ? height + 50 : "350" ) + ",")
}