agent=navigator.appName
versie=parseInt(navigator.appVersion)
browserVer=1
if (agent=="Microsoft Internet Explorer" && versie==4) {
	browserVer=2
}
if (agent=="Netscape" && versie>=3) {
	browserVer=2
}
if (browserVer==2) {
  if (document.images) {
		     
	    concepton = new Image();
        concepton.src = "img/button_concept_on.gif";
        conceptoff = new Image();
        conceptoff.src = "img/button_concept_off.gif";
		
		conceptton = new Image();
        conceptton.src = "img/button_concept_text.gif";
		concepttoff = new Image();
        concepttoff.src = "img/nix.gif";
		
		toon = new Image();
        toon.src = "img/button_to_on.gif";
        tooff = new Image();
        tooff.src = "img/button_to_off.gif";
		
		toton = new Image();
        toton.src = "img/button_to_text.gif";
		totoff = new Image();
        totoff.src = "img/nix.gif";
		
		goon = new Image();
        goon.src = "img/button_go_on.gif";
        gooff = new Image();
        gooff.src = "img/button_go_off.gif";
		
		goton = new Image();
        goton.src = "img/button_go_text.gif";
		gotoff = new Image();
        gotoff.src = "img/nix.gif";
		
		foon = new Image();
        foon.src = "img/button_fo_on.gif";
        fooff = new Image();
        fooff.src = "img/button_fo_off.gif";
		
		foton = new Image();
        foton.src = "img/button_fo_text.gif";
		fotoff = new Image();
        fotoff.src = "img/nix.gif";
		
		realisatieon = new Image();
        realisatieon.src = "img/button_realisatie_on.gif";
        realisatieoff = new Image();
        realisatieoff.src = "img/button_realisatie_off.gif";
		
		realisatieton = new Image();
        realisatieton.src = "img/button_realisatie_text.gif";
		realisatietoff = new Image();
        realisatietoff.src = "img/nix.gif";
		
		testenon = new Image();
        testenon.src = "img/button_testen_on.gif";
        testenoff = new Image();
        testenoff.src = "img/button_testen_off.gif";
		
		testenton = new Image();
        testenton.src = "img/button_testen_text.gif";
		testentoff = new Image();
        testentoff.src = "img/nix.gif";
		
		evaluatieon = new Image();
        evaluatieon.src = "img/button_evaluatie_on.gif";
        evaluatieoff = new Image();
        evaluatieoff.src = "img/button_evaluatie_off.gif";
		
		evaluatieton = new Image();
        evaluatieton.src = "img/button_evaluatie_text.gif";
		evaluatietoff = new Image();
        evaluatietoff.src = "img/nix.gif";
		
		onderhoudon = new Image();
        onderhoudon.src = "img/button_onderhoud_on.gif";
        onderhoudoff = new Image();
        onderhoudoff.src = "img/button_onderhoud_off.gif";
		
		onderhoudton = new Image();
        onderhoudton.src = "img/button_onderhoud_text.gif";
		onderhoudtoff = new Image();
        onderhoudtoff.src = "img/nix.gif";
		
    }
  }
    function hiLite(imgDocID,imgObjName) {
        if (browserVer==2) {
             document.images[imgDocID].src=eval(imgObjName+".src")      
             }
        }

function frame_update(URL1)
{
parent.frames[1].location=URL1;
}