var br = 0;

function BrowserCheck(){
	isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
	NS4 = (document.layers) ? true : false;
	IEmac = ((document.all)&&(isMac)) ? true : false;
	IE4plus = (document.all) ? true : false;
	IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
	IE5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;
	IE6 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 6.")!=-1)) ? true : false;
	ver4 = (NS4 || IE4plus) ? true : false;
	NS6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1)?true:false;
	IE5plus = IE5 || IE6;
	IEMajor = 0;
	Mozilla = navigator.userAgent.indexOf('Mozilla')!=-1?true:false;

	if (IE4plus){
		var start = navigator.appVersion.indexOf("MSIE");
		var end = navigator.appVersion.indexOf(".",start);
		IEMajor = parseInt(navigator.appVersion.substring(start+5,end));
		IE5plus = (IEMajor>=5) ? true : false;
	}
	
	// Mac = 0 
	// Netscape = 1
	// IE = 2
	if (isMac || IEmac) br = 0;
	if (NS4 || NS6 || Mozilla) br = 1;
	if (IE4 || IE5 || IE6 || IE4plus || IE5plus) br = 2;
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,ia=MM_preloadImages.arguments; for(i=0; ia.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&id.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


function preloadImages() {
  var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function swap(imagename,objectsrc)
	{
	var n=navigator.appName
	var v=parseInt(navigator.appVersion)
        var browsok=((n=="Netscape")&&(v>=3))
        var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
        if ((browsok)||(browsok2))
       	//document.images[imagename].src=eval(objectsrc+".src");
       	document.getElementById[imagename].src=eval(objectsrc+".src");
}

function swapSpecial(imagename,objectsrc)
	{
	document.getElementById("kaart").style.display = "none";
	var n=navigator.appName
	var v=parseInt(navigator.appVersion)
        var browsok=((n=="Netscape")&&(v>=3))
        var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
        if ((browsok)||(browsok2))
       	document.images[imagename].src=eval(objectsrc+".src");
}

function LTrim(str) {
	if (str.length == 0) {return str};
	intSpaceFound = str.indexOf(" ");
	while (intSpaceFound == 0 ) {
		str = str.substring(1,str.length);
		intSpaceFound = str.indexOf(" ");
	}	
	return str;
}

function RTrim(str) {
	if (str.length == 0) {return str};
	intSpaceFound = str.lastIndexOf(" ");
	while (intSpaceFound > 0 && intSpaceFound == str.length - 1) {
		str = str.substring(0,str.length - 1);
		intSpaceFound = str.lastIndexOf(" ");
	}	
	return str;
}

function Trim(str) {
	str = LTrim(str);
	str = RTrim(str);
	return str;
}


function show(ima, nr){
	for (i=0;i<nr;i++){
		document.getElementById(i).style.display = "none";
	}
	document.getElementById(ima).style.display = "";
}


function checkForm(){

	if (document.forms[0].naam.value==""){
		alert('Please enter your name');
		document.forms[0].naam.focus();
		return false;
	}

	if (document.forms[0].email.value==""){
			alert ('Please enter your email address');
			document.forms[0].email.focus();
			return false;
	}else{
		if (!emailadrescheck(document.forms[0].email.value)){
			alert('Please enter a valid email address');
			document.forms[0].email.focus();
			return false;
		}

	}
	if (document.forms[0].chkcode.value==""){
			alert('Please enter the characters you see in the image');
			document.forms[0].chkcode.focus();
			return false;
	}
	
	return true;
}



function emailadrescheck(temp){
	
	var AtSym    = temp.indexOf('@');
	var Period   = temp.lastIndexOf('.')
	var Space    = temp.indexOf(' ')
	var Length   = temp.length - 1   // Array is from 0 to length-1

	if ((AtSym < 1) ||                  // '@' cannot be in first position
	(Period <= AtSym+2) ||            // Must be atleast one valid char btwn '@' and '.'
	(Period == Length ) ||            // Must be atleast one valid char after '.'
	(Space  != -1))                   // No empty spaces permitted
	{
		return false;
	}
	return true;

}


function color(color){
	document.getElementById("multiples").style.color = color;
}
var m = 0;
var aantal = 0;
function setColor(){
	if (aantal == 8) clearInterval(intColor);
	if (m == 1){
		color("#cc0000");
		m = 0;
	}else{
		color("#fff");
		m = 1;
	}
	aantal++;
}
intColor = setInterval(setColor,1000);

function film(){
	if (confirm("After you confirm, you will be linked to antoher website with more information about 'All is Light' the documentary of Jan Henderikse.\nThis website will be opened in a new window")){
		window.open ("http://www.memphisfilm.net/filminfo_d_nl.php?id=10", "film", "width=700,height=450,resizable=yes,toolbar=yes, scrollbars=yes");
	};
}


function newwin(url){
	window.open (url, "link", "width=700,height=450,resizable=yes,toolbar=yes, scrollbars=yes");
}