function XmlPrijsTabel(reisid,iata,basis,pref_week){
	document.getElementById('ajaxprijstabel').innerHTML = "<center><img src='/images/loaders/preloader_big.gif'><br>Een ogenblik geduld, de prijzen worden geladen.</center>";

//	alert(pref_week +' en '+ readCookie('user_prefs_yearweeks'));

	//Check if cookie for user_prefs_yearweeks is set and show the first week in that array
	if(readCookie('user_prefs_yearweeks') && pref_week) {
		var weeks = readCookie('user_prefs_yearweeks').split("-");
		var set = 0;
        	if(document.weekkeuze.weekkiezer){
			var el = document.weekkeuze.weekkiezer;
			for (j=0; j<el.length; j++) {
				for(k=0;k<weeks.length;k++) {
					if(el[j].value==weeks[k]) {
						if(set == 0 ) {
							document.weekkeuze.weekkiezer.selectedIndex = j;
							set = 1;
						}
					}
				}
	                }
        	}		
	}

	var erzijnprijzen = 0;
	if(document.weekkeuze.weekkiezer){
		if(document.weekkeuze.weekkiezer.selectedIndex >= 0){
			var weekIndex = document.weekkeuze.weekkiezer.selectedIndex;
			if(document.weekkeuze.weekkiezer[weekIndex].value){
				var weekValue = document.weekkeuze.weekkiezer[weekIndex].value;
				erzijnprijzen = 1;
			}
		}
	}
	if(erzijnprijzen == 0){
		document.getElementById('weekselectie').innerHTML='Sorry, de aanbieding is op dit moment volgeboekt!';
	}
	var xmlHttp;
	var date = new Date();
	var url ='/ajax/xmlpricetable/xmlprijstabel.php?ID=' + reisid + '&iata=' + iata + '&basis=' + basis + '&week=' + weekValue + '&time='+date.getTime();
	try
	{
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	xmlHttp.onreadystatechange=function()
	{
		if(xmlHttp.readyState==4)
		{
			var rt = xmlHttp.responseText;
			if(rt.match(/er is een fout opgetreden/g)) {
				changeXmlweek(1,reisid,iata,basis);
			} else {
				document.getElementById('ajaxprijstabel').innerHTML = rt;
			}
		}
	}
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function changeXmlweek(verandering,reisid,iata,basis){
	var weekIndex = document.weekkeuze.weekkiezer.selectedIndex;
	if((weekIndex+verandering) < 0){
		//doe niks
	} else {
		if((weekIndex+verandering) >= document.weekkeuze.weekkiezer.length){
			//doe niks
		} else {
			document.weekkeuze.weekkiezer.selectedIndex = weekIndex+verandering;
			XmlPrijsTabel(reisid,iata,basis);
		}
	}
}