var ie = document.all ? 1 : 0;
var ns = document.layers ? 1 : 0;
var mac = ((navigator.appVersion.indexOf("Mac") != -1)) ? 1 : 0;
var pc = ((navigator.appVersion.indexOf("Mac") == -1)) ? 1 : 0;

function openNewWin(theURL,winName,features) 
  {
  window.open(theURL,winName,features);
  }

function newImage(arg)
  {
  if (document.images)
    {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
    }
  }

function changeImages()
  {
  if (document.images && (preloadFlag == true))
    {
    for (var i=0; i<changeImages.arguments.length; i+=2)
      {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1]).src;
      }
    }
  }

var preloadFlag = false;

if (document.images)
	{
	// preload navigation button images
	//homeSt = newImage("images/navbut/home.gif");
	//homeOv = newImage("images/navbut/home_ov.gif");
	//aboutSt = newImage("images/navbut/about.gif");
	//aboutOv = newImage("images/navbut/about_ov.gif");
	//servicesSt = newImage("images/navbut/services.gif");
	//servicesOv = newImage("images/navbut/services_ov.gif");
	//supportSt = newImage("images/navbut/support.gif");
	//supportOv = newImage("images/navbut/support_ov.gif");
	//newsSt = newImage("images/navbut/news.gif");
	//newsOv = newImage("images/navbut/news_ov.gif");
	//contactSt = newImage("images/navbut/contact.gif");
	//contactOv = newImage("images/navbut/contact_ov.gif");
	preloadFlag = true;
	}
	
function changepic(img_name,img_src) {
document[img_name].src=img_src;
}