var iversion = -1;

var roll=false;


function version() {

         if (iversion != -1) return roll;



        if (navigator.appName.indexOf("Netscape") != -1) { // Netscape

                if (navigator.userAgent.indexOf("Mozilla/") != -1)

                        iversion = parseFloat(navigator.appVersion)

                else

                        iversion = 1;

                roll = (3<=iversion);

        } else {  // Not netscape.

                if (navigator.appName.indexOf("Internet Explorer") != -1) {

                        if (navigator.userAgent.indexOf("Mozilla/") != -1) 

                                iversion = parseFloat(navigator.appVersion)

                        else

                                iversion = 1;

                } else {

                        iversion = 1;

                }

                roll = (3<=iversion);

        }

        return roll;

}



if (version()) 

<!--

if (window.focus) self.focus();

if (document.images) {
  
  navOff = new Image();
  navOff.src = "nav"

  nav1On = new Image();
  nav1On.src = "nav-dansity.gif"

  nav1Off = new Image();
  nav1Off.src = "nav-dansity.gif"

  nav2On = new Image();
  nav2On.src = "nav-calender.gif"

  nav2Off = new Image();
  nav2Off.src = "nav-calender.gif"

  nav3On = new Image();
  nav3On.src = "nav-archive.gif"

  nav3Off = new Image();
  nav3Off.src = "nav-archive.gif"

  nav4On = new Image();
  nav4On.src = "nav-contact.gif"

  nav4Off = new Image();
  nav4Off.src = "nav-contact.gif"

  nav5On = new Image();
  nav5On.src = "nav-links.gif"

  nav5Off = new Image();
  nav5Off.src = "nav-links.gif"
  }

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