// convert all characters to lowercase to simplify testing
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));

// *** JAVASCRIPT VERSION CHECK ***
var is_js;
if (is_nav2 || is_ie3) is_js = 1.0;
else if (is_nav3) is_js = 1.1;
else if (is_opera5up) is_js = 1.3;
else if (is_opera) is_js = 1.1;
else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
else if (is_hotjava3up) is_js = 1.4;
else if (is_nav6 || is_gecko) is_js = 1.5;
// NOTE: In the future, update this code when newer versions of JS
// are released. For now, we try to provide some upward compatibility
// so that future versions of Nav and IE will show they are at
// *least* JS 1.x capable. Always check for JS version compatibility
// with > or >=.
else if (is_nav6up) is_js = 1.5;
// NOTE: ie5up on mac is 1.4
else if (is_ie5up||is_opera) is_js = 1.3

// HACK: no idea for other browsers; always check for JS version with > or >=
else is_js = 0.0;

// *** PLATFORM ***
var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
// NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
//        Win32, so you can't distinguish between Win95 and WinNT.
var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

// is this a 16 bit compiled version?
var is_win16 = ((agt.indexOf("win16")!=-1) || 
			(agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || 
			(agt.indexOf("windows 16-bit")!=-1) );  

var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
				  (agt.indexOf("windows 16-bit")!=-1));

var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1));

// NOTE: Reliable detection of Win98 may not be possible. It appears that:
//       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
//       - On Mercury client, the 32-bit version will return "Win98", but
//         the 16-bit version running on Win98 will still return "Win95".
var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
var is_win32 = (is_win95 || is_winnt || is_win98 || 
				  ((is_major >= 4) && (navigator.platform == "Win32")) ||
				  (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

var is_os2   = ((agt.indexOf("os/2")!=-1) || 
				  (navigator.appVersion.indexOf("OS/2")!=-1) ||   
				  (agt.indexOf("ibm-webexplorer")!=-1));

var is_mac    = (agt.indexOf("mac")!=-1);
// hack ie5 js version for mac
if (is_mac && is_ie5up) is_js = 1.4;
var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) || 
								 (agt.indexOf("68000")!=-1)));
var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) || 
								  (agt.indexOf("powerpc")!=-1)));

var is_sun   = (agt.indexOf("sunos")!=-1);
var is_sun4  = (agt.indexOf("sunos 4")!=-1);
var is_sun5  = (agt.indexOf("sunos 5")!=-1);
var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));
var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
var is_irix5 = (agt.indexOf("irix 5") !=-1);
var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
var is_hpux  = (agt.indexOf("hp-ux")!=-1);
var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));
var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));
var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
var is_aix1  = (agt.indexOf("aix 1") !=-1);    
var is_aix2  = (agt.indexOf("aix 2") !=-1);    
var is_aix3  = (agt.indexOf("aix 3") !=-1);    
var is_aix4  = (agt.indexOf("aix 4") !=-1);    
var is_linux = (agt.indexOf("inux")!=-1);
var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
var is_mpras    = (agt.indexOf("ncr")!=-1); 
var is_reliant  = (agt.indexOf("reliantunix")!=-1);
var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
	  (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
	  (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
var is_sinix = (agt.indexOf("sinix")!=-1);
var is_freebsd = (agt.indexOf("freebsd")!=-1);
var is_bsd = (agt.indexOf("bsd")!=-1);
var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 
			  is_sco ||is_unixware || is_mpras || is_reliant || 
			  is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

var is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));

if(document.images){
	var imgbarCacheLeft = new Array();
	imgbarCacheLeft[0] = new Image(236,160);
	imgbarCacheLeft[0].src = 'images/ibar/krant-europees1.JPG';
	imgbarCacheLeft[0].ms = 3000;
	imgbarCacheLeft[1] = new Image(236,160);
	imgbarCacheLeft[1].src = 'images/ibar/00012031.JPG';
	imgbarCacheLeft[1].ms = 3000;
	imgbarCacheLeft[2] = new Image(236,160);
	imgbarCacheLeft[2].src = 'images/ibar/00012101.JPG';
	imgbarCacheLeft[2].ms = 3000;
	imgbarCacheLeft[3] = new Image(236,160);
	imgbarCacheLeft[3].src = 'images/ibar/00070781.JPG';
	imgbarCacheLeft[3].ms = 3000;
	imgbarCacheLeft[4] = new Image(236,160);
	imgbarCacheLeft[4].src = 'images/ibar/j03990311.JPG';
	imgbarCacheLeft[4].ms = 3000;
	imgbarCacheLeft[5] = new Image(236,160);
	imgbarCacheLeft[5].src = 'images/ibar/j03991831.JPG';
	imgbarCacheLeft[5].ms = 3000;
	imgbarCacheLeft[6] = new Image(236,160);
	imgbarCacheLeft[6].src = 'images/ibar/j03996611.JPG';
	imgbarCacheLeft[6].ms = 3000;
	imgbarCacheLeft[7] = new Image(236,160);
	imgbarCacheLeft[7].src = 'images/ibar/j04000401.JPG';
	imgbarCacheLeft[7].ms = 3000;
	imgbarCacheLeft[8] = new Image(236,160);
	imgbarCacheLeft[8].src = 'images/ibar/j04004411.JPG';
	imgbarCacheLeft[8].ms = 3000;
	imgbarCacheLeft[9] = new Image(236,160);
	imgbarCacheLeft[9].src = 'images/ibar/stoomboot (Custom).jpg';
	imgbarCacheLeft[9].ms = 3000;

	imgbarCacheMiddle = new Image(480,160);
	imgbarCacheMiddle.src = 'images/ibar/boat4.JPG';

	var imgbarCacheRight = new Array();
	imgbarCacheRight[0] = new Image(236,160);
	imgbarCacheRight[0].src = 'images/ibar/j04018801.JPG';
	imgbarCacheRight[0].ms = 3000;
	imgbarCacheRight[1] = new Image(236,160);
	imgbarCacheRight[1].src = 'images/ibar/j04019411.JPG';
	imgbarCacheRight[1].ms = 3000;
	imgbarCacheRight[2] = new Image(236,160);
	imgbarCacheRight[2].src = 'images/ibar/j04027611.JPG';
	imgbarCacheRight[2].ms = 3000;
	imgbarCacheRight[3] = new Image(236,160);
	imgbarCacheRight[3].src = 'images/ibar/j04030521.JPG';
	imgbarCacheRight[3].ms = 3000;
	imgbarCacheRight[4] = new Image(236,160);
	imgbarCacheRight[4].src = 'images/ibar/j04033701.JPG';
	imgbarCacheRight[4].ms = 3000;
	imgbarCacheRight[5] = new Image(236,160);
	imgbarCacheRight[5].src = 'images/ibar/j04033831.JPG';
	imgbarCacheRight[5].ms = 3000;
	imgbarCacheRight[6] = new Image(236,160);
	imgbarCacheRight[6].src = 'images/ibar/j04067281.JPG';
	imgbarCacheRight[6].ms = 3000;
	imgbarCacheRight[7] = new Image(236,160);
	imgbarCacheRight[7].src = 'images/ibar/j04090981.JPG';
	imgbarCacheRight[7].ms = 3000;
	imgbarCacheRight[8] = new Image(236,160);
	imgbarCacheRight[8].src = 'images/ibar/teleport_noc1.JPG';
	imgbarCacheRight[8].ms = 3000;
	imgbarCacheRight[9] = new Image(236,160);
	imgbarCacheRight[9].src = 'images/ibar/j04096901.JPG';
	imgbarCacheRight[9].ms = 3000;
}

function randomInteger(min, max)
{
	return Math.round(Math.random() * max) + min;
}

function imgbarCycleLeft()
{
	if(imgbarCacheLeft.length == 0){ return; }
	if(imgbarCycleLeft.i == imgbarCacheLeft.length){ imgbarCycleLeft.i = 0; }
	i = imgbarCycleLeft.i++;

	if (is_ie5up||is_opera) {
		imgbarLeft.src = imgbarCacheLeft[i].src;
	} else if (is_nav4up) {
		document.getElementById("imgbarLeft").src = imgbarCacheLeft[i].src;
	}
	else {
		document.getElementById("imgbarLeft").src = imgbarCacheLeft[i].src;
	}
	setTimeout(imgbarCycleLeft, imgbarCacheLeft[i].ms);

}imgbarCycleLeft.i = randomInteger(0, 9);


function imgbarCycleRight()
{
	if(imgbarCycleRight.i == imgbarCacheRight.length){ imgbarCycleRight.i = 0; }
	i = imgbarCycleRight.i++;

	if (is_ie5up||is_opera) {
		imgbarRight.src = imgbarCacheRight[i].src;
	} else if (is_nav4up) {
		document.getElementById("imgbarRight").src = imgbarCacheRight[i].src;
	}
	else {
		document.getElementById("imgbarRight").src = imgbarCacheRight[i].src;
	}	setTimeout(imgbarCycleRight, imgbarCacheRight[i].ms);

}imgbarCycleRight.i = randomInteger(0, 8);


function imgbarInit()
{
	if(!document.images){ return; }
		
	if (is_ie5up) {
		imgbarMiddle.src = imgbarCacheMiddle.src;
	} else if (is_nav4up||is_opera) {
		document.getElementById("imgbarMiddle").src = imgbarCacheMiddle.src;
	}
	else {
		document.getElementById("imgbarMiddle").src = imgbarCacheMiddle.src;
	}		
	if(imgbarCacheLeft.length){
		setTimeout(imgbarCycleLeft, 0);
	}

	if(imgbarCacheRight.length){
		setTimeout(imgbarCycleRight, 0);
	}
}