w33c = (document.getElementById)? true:false;
if (w33c) {
	nsb4 = false;
	ieb4 = false;
}
else if (!w33c) {
	nsb4 = (document.layers)? true:false;
	ieb4 = (document.all)? true:false;
}

if (w33c || ieb4 || nsb4) 	browserOK = true;

if (navigator.userAgent.indexOf("Firefox")!=-1)
	firefox = 1;
else
	firefox = 0;

function popupP(url,width,height) {

	var winl = (screen.width-width)/2;
	var wint = (screen.height-height)/2;
	var settings ='height='+height+',';
	settings +='width='+width+',';
	settings +='top='+wint+',';
	settings +='left='+winl+',';
	settings +='scrollbars=1,';
	settings +='resizable=1';
	
    settings += "toolbar=0,location=0,statusbar=0,menubar=0";
    winopen = window.open(url,'',settings);
    if (winopen.opener == null) winopen.opener = self;

}


function con(msg) {
	
	if(!msg)
		msg = "Weet u dit zeker ?";
		
    if(!confirm("Let op: "+msg))
		return false;
       
	return true;
}

function createCookie(name,value,days) {
	
	days = 1;
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(60*4000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function nav(id, par) {
	
	var x = readCookie(id);
	if(x == 1) {
		Effect.BlindUp(id, {duration : 0.5 } );
		eraseCookie(id);
		Effect.Fade('changeContent',{duration: 0.1 });
		$('topImage').show();
		loadPage('topImage',"topImage",par,1);
	}
	else {
		Effect.BlindDown(id, {duration : 0.5 } );
		createCookie(id,'1',7);
		Effect.Fade('changeContent',{duration: 0.1 });
		$('topImage').show();
		loadPage('topImage',"topImage",par,1);
	}
}