function rollOver(imageTagName, imageFileName)
{
  document.images[imageTagName].src=imageFileName;
}
    

function rollOverDouble(imageTagName, imageFileName, imageTagName2, imageFileName2)
{
  document.images[imageTagName].src=imageFileName;
  document.images[imageTagName2].src=imageFileName2;
}
  	
	

function openWindow(url, h, w)
{
  isNav=(navigator.appName=="Netscape")?true:false;
  isIE=(navigator.appName.indexOf("Microsoft") != -1)?true:false;

  if (isNav)
  {
    h=h+50;
    w=w+50;
  }

  x=screen.width;
  y=screen.height;
  sX=(x/2)-(w/2);
  sY=(y/2)-(h/2);
  features='menubar=no,status=no,location=no,toolbar=no,directories=no,scrollbars=yes,';

  if (isNav)
    features+='outerHeight='+h+',outerWidth='+w+',screenX='+sX+',screenY='+sY;
  else
    features+='height='+h+',width='+w+',left='+sX+',top='+sY;

  newWin=window.open(url,"POPUP_WINDOW",features);
}