if (document.images) {
  //menu
  var homeOFF = new Image(); homeOFF.src="images/btns/home.gif";
  var homeON = new Image(); homeON.src="images/btns/home_roll.gif";

  var newsOFF = new Image(); newsOFF.src="images/btns/news.gif";
  var newsON = new Image(); newsON.src="images/btns/news_roll.gif";

  var aboutOFF = new Image(); aboutOFF.src="images/btns/about.gif";
  var aboutON = new Image(); aboutON.src="images/btns/about_roll.gif";

  var collOFF = new Image(); collOFF.src="images/btns/coll.gif";
  var collON = new Image(); collON.src="images/btns/coll_roll.gif";

  var contactOFF = new Image(); contactOFF.src="images/btns/contact.gif";
  var contactON = new Image(); contactON.src="images/btns/contact_roll.gif";

  var careersOFF = new Image(); careersOFF.src="images/btns/careers.gif";
  var careersON = new Image(); careersON.src="images/btns/careers_roll.gif";

  var newframesOFF = new Image(); newframesOFF.src="images/btns/newframes.gif";
  var newframesON = new Image(); newframesON.src="images/btns/newframes_roll.gif";

  var eightkOFF = new Image(); eightkOFF.src="images/btns/sub_8000.gif";
  var eightkON = new Image(); eightkON.src="images/btns/sub_8000_roll.gif";
 
  var fivekOFF = new Image(); fivekOFF.src="images/btns/sub_5000.gif";
  var fivekON = new Image(); fivekON.src="images/btns/sub_5000_roll.gif"; 
  var threekOFF = new Image(); threekOFF.src="images/btns/sub_3000.gif";
  var threekON = new Image(); threekON.src="images/btns/sub_3000_roll.gif"; 

  var sunOFF = new Image(); sunOFF.src="images/btns/sub_tokiflex.gif";
  var sunON = new Image(); sunON.src="images/btns/sub_tokiflex_roll.gif"; 
  var gmsOFF = new Image(); gmsOFF.src="images/btns/sub_gms.gif";
  var gmsON = new Image(); gmsON.src="images/btns/sub_gms_roll.gif"; 

  var rimlessOFF = new Image(); rimlessOFF.src="images/btns/sub_rimless.gif";
  var rimlessON = new Image(); rimlessON.src="images/btns/sub_rimless_roll.gif"; 
}


function act(imgName) {
 if (document.images) 
  document[imgName].src = eval(imgName + 'ON.src')
}

function inact(imgName) {
 if (document.images)
  document[imgName].src = eval(imgName + 'OFF.src')
}