var chr = 'CTRL-D';
var agt = navigator.userAgent.toLowerCase();

function addToFavorites() {
	if (window.sidebar) { // Mozilla Firefox Bookmark
		window.sidebar.addPanel(document.title, self.location, "");
	}else {
		if(agt.substr(agt.indexOf('opera')+6,1) < 9) chr = 'CTRL-T';
		if (window.external) window.external.AddFavorite(self.location,document.title);
		else alert('Toets '+chr+' om deze pagina toe te voegen aan uw favorieten.');
	}
} 

function setOpacity(objObject, opacity) {
	
	if(objObject.className = "menulogin" && document.getElementById('user')) {
		fieldUser = document.getElementById('user').value;
		fieldPass = document.getElementById('pass').value;
		
		if(fieldUser != '' || fieldPass != '') {
			opacity = 100;
		}
	}
	
	if(objObject.className = "menusearch") {
		fieldSearch = document.getElementById('sword').value;
		if(fieldSearch != '') {
			opacity = 100;
		}
	}
	
	if (navigator.appName.indexOf("Netscape") != -1 && parseInt(navigator.appVersion) >=5 ) {
		objObject.style.MozOpacity = opacity/100
	}else{
		if (navigator.appName.indexOf("Microsoft") != -1 && parseInt(navigator.appVersion) >= 4 ) {
			objObject.filters.alpha.opacity = opacity;			
		}
	}
}

function closePopup() {
	document.getElementById("popup_bglayer").style.display = "none";
	document.getElementById("popup_layer").style.display = "none";
	document.getElementById("popup_image").style.display = "none";	
}

function openPopup() {
	cookieSet = getCookie('subscriber_popup');
	
	if(!cookieSet ) {
		document.getElementById("popup_bglayer").style.display = "block";
		document.getElementById("popup_layer").style.display = "block";
		document.getElementById("popup_image").style.display = "block";	
		popUpCookie();
	}
}

function popUpCookie() {
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + 30);
	document.cookie = "subscriber_popup"+"="+escape(1)+(";expires="+exdate.toGMTString())+";path=/";
}

function getCookie(cookieName) {
	if(document.cookie.length > 0) {
		cookieStart = document.cookie.indexOf(cookieName+"=");
		if(cookieStart != -1) {
			cookieStart = cookieStart + cookieName.length + 1;
			cookieEnd = document.cookie.indexOf(";", cookieStart);
			if (cookieEnd == -1) cookieEnd = document.cookie.length;
   			
			return unescape(document.cookie.substring(cookieStart, cookieEnd));
    	} 
  	}
  	
	return "";
}