var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    // KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
    // or if this is the first browser window opened.  Thus the
    // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

    var is_webtv = (agt.indexOf("webtv") != -1); 

    var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

    var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));


function plaats()	{
	if (is_ie) {
	}
	else if (is_gecko) {
		var tempje = window.innerHeight - document.getElementById('maincenter').offsetHeight;
		document.getElementById('maincenter').style.top=tempje+'px';
		document.body.style.top='0px';
	}
}

function mOvr(lang, id, img) {
	var tmp = new Image();
	tmp.src='/images/'+lang+'/nav/'+img;
	document.getElementById(id).src=tmp.src;
}

function disBut(id, disimg)	{
	var tmp = new Image();
	tmp.src='/images/'+disimg;
	document.getElementById(id).src=tmp.src;
	document.getElementById(id).disabled=true;
	document.body.style.cursor='wait';
	vragenform.submit();
}

function sBt(id, img) {
	var tmp = new Image();
	tmp.src='images/'+img;
	document.getElementById(id).src=tmp.src;
}

//function fsPopup(URL) {
//window.open('/fullsize.php?fn='+URL, 'imagething', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0');
//}

function fsPopup(URL,afbeeldingenstring) {
  var randomstring = randomString();
	window.open('/fullsize.php?fn='+URL+'&afb='+afbeeldingenstring, randomstring, 'toolbar=false,scrollbars=false,location=false,statusbar=false,menubar=false,resizable=false');
}

function chDesc(wat)	{
		document.getElementById('desc').innerHTML = wat;
}

/*
function chImg(preview, fullsize)	{
	var tmp = new Image();
	tmp.src = preview;
	document.getElementById('pref').href='javascript:fsPopup(\''+fullsize+'\');';
	document.getElementById('pref2').href='javascript:fsPopup(\''+fullsize+'\');';
	document.getElementById('pimg').src=tmp.src;
}
*/
function chImg(preview, fullsize,afb1,afb2,afb3,afb4)	{
	var tmp = new Image();
	tmp.src = preview;
	document.getElementById('pref').href='javascript:fsPopup(\''+fullsize+'\',\''+afb1+'\',\''+afb2+'\',\''+afb3+'\',\''+afb4+'\');';
	document.getElementById('pref2').href='javascript:fsPopup(\''+fullsize+'\',\''+afb1+'\',\''+afb2+'\',\''+afb3+'\',\''+afb4+'\');';
	document.getElementById('pimg').src=tmp.src;
}

function switchTaal(taal) {
		var url = document.location.href;

		var regex= /db.cgi/i;
		if (regex.test(url)) {
			document.location.href='/'+taal+'/occasions.html';
		}
		else {
	    var DocName =(url.substring(url.lastIndexOf("\/")+1));
			document.location.href='/'+taal+'/'+DocName;
		}
}

function randomString() {
	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
	var string_length = 8;
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	return randomstring;
}

function changePage(newLoc, taal) {
   nextPage = newLoc.options[newLoc.selectedIndex].value
   if (nextPage != "") {
	var deLink = ''
	//deLink += "/cgi-bin/dbsql/db.cgi?db=" + nextPage
	deLink += "/cgi-bin/dbsql/db.cgi?db=occasions&taal=" + taal + "&weergeven=1&w=1&rubriek=" + nextPage
	
    self.ifrcontent.location.href = deLink
   }
}