function getWindowHeight() {
var windowHeight=0;
if (typeof(window.innerHeight)=='number') {
windowHeight=window.innerHeight;
}
else {
if (document.documentElement&&
document.documentElement.clientHeight) {
windowHeight=
document.documentElement.clientHeight;
}
else {
if (document.body&&document.body.clientHeight) {
windowHeight=document.body.clientHeight;
}
}
}
return windowHeight;
}

function setDIVHeight() {
if (document.getElementById) {
	var windowHeight=getWindowHeight();
	if (windowHeight>400) {
	var contElement=document.getElementById('container');
	contElement.style.height=windowHeight - 40 + "px";
	var contElement=document.getElementById('menu');
	contElement.style.height=windowHeight - 184 + "px";
	var contElement=document.getElementById('content');
	contElement.style.height=windowHeight - 190 + "px";
	}
}
}

window.onresize = function(){
	setDIVHeight();
}

function setOptions(chosen) {
var selbox = document.ABform.datum;
 
selbox.options.length = 0;
if (chosen == " ") {
  selbox.options[selbox.options.length] = new Option('Kies een cursus uit het menu',' ');
 
}
if (chosen == "Spelling") {
  selbox.options[selbox.options.length] = new Option(' ','');
  selbox.options[selbox.options.length] = new Option('Donderdag 9 februari 2012 - Utrecht','9februari2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 13 maart 2012 - Rotterdam','13maart2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 19 april 2012 - Amsterdam','19april2012amsterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 12 juni 2012 - Zwolle','12juni2012zwolle');
  selbox.options[selbox.options.length] = new Option('Dinsdag 26 juni 2012 - Utrecht','26juni2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 18 september 2012 - Eindhoven','18september2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Donderdag 4 oktober 2012 - Rotterdam','4oktober2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 8 november 2012 - Utrecht','8november2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 20 november 2012 - Zwolle','20november2012zwolle');
  selbox.options[selbox.options.length] = new Option('Donderdag 13 december 2012 - Amsterdam','13december2012amsterdam');
}
if (chosen == "Grammatica") {
  selbox.options[selbox.options.length] = new Option(' ','');
  selbox.options[selbox.options.length] = new Option('Dinsdag 6 maart 2012 - Rotterdam','6maart2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 29 maart 2012 - Utrecht','29maart2012utrecht');
  selbox.options[selbox.options.length] = new Option('Donderdag 12 april 2012 - Amsterdam','12april2012amsterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 5 juni 2012 - Zwolle','5juni2012zwolle');
  selbox.options[selbox.options.length] = new Option('Dinsdag 19 juni 2012 - Utrecht','19juni2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 11 september 2012 - Eindhoven','11september2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Donderdag 27 september 2012 - Rotterdam','27september2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 1 november 2012 - Utrecht','1november2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 13 november 2012 - Zwolle','13november2012zwolle');
  selbox.options[selbox.options.length] = new Option('Donderdag 6 december 2012 - Amsterdam','6december2012amsterdam');
}
if (chosen == "ZakelijkeCorrespondentie") {
  selbox.options[selbox.options.length] = new Option(' ','');
  selbox.options[selbox.options.length] = new Option('Dinsdag 7 februari 2012 - Zwolle','7februari2012zwolle');
  selbox.options[selbox.options.length] = new Option('Donderdag 1 maart 2012 - Amsterdam','1maart2012amsterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 27 maart 2012 - Utrecht','27maart2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 17 april 2012 - Rotterdam','17april2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 10 mei 2012 - Eindhoven','10mei2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Donderdag 21 juni 2012 - Utrecht','21juni2012utrecht');
  selbox.options[selbox.options.length] = new Option('Donderdag 13 september 2012 - Rotterdam','13september2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 25 september 2012 - Utrecht','25september2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 9 oktober 2012 - Eindhoven','9oktober2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Donderdag 15 november 2012 - Zwolle','15november2012zwolle');
  selbox.options[selbox.options.length] = new Option('Dinsdag 27 november 2012 - Amsterdam','27november2012amsterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 11 december 2012 - Utrecht','11december2012utrecht');
}
if (chosen == "TienoverTaal") {
  selbox.options[selbox.options.length] = new Option(' ','');
  selbox.options[selbox.options.length] = new Option('Donderdag 16 februari 2012 - Rotterdam','16februari2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Donderdag 15 maart 2012 - Utrecht','15maart2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 3 april 2012 - Eindhoven','3april2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Donderdag 17 mei 2012 - Zwolle','17mei2012zwolle');
  selbox.options[selbox.options.length] = new Option('Donderdag 20 september 2012 - Rotterdam','20september2012rotterdam');
  selbox.options[selbox.options.length] = new Option('Dinsdag 2 oktober 2012 - Utrecht','2oktober2012utrecht');
  selbox.options[selbox.options.length] = new Option('Dinsdag 30 oktober 2012 - Zwolle','30oktober2012zwolle');
  selbox.options[selbox.options.length] = new Option('Donderdag 22 november 2012 - Eindhoven','22november2012eindhoven');
  selbox.options[selbox.options.length] = new Option('Dinsdag 11 december 2012 - Amsterdam','11december2012amsterdam');
}
}

function setCursus() {
cursus = queryString('cursus');
aantalcursus=document.ABform.cursus.options.length;
for (i=0;i<aantalcursus;i++){
	if (document.ABform.cursus.options[i].value == cursus) document.ABform.cursus.selectedIndex=i;
}
setOptions(cursus);
datum=queryString('datum');
aantaldata=document.ABform.datum.options.length;
for (i=0;i<aantaldata;i++){
	if (document.ABform.datum.options[i].value == datum) document.ABform.datum.selectedIndex=i;
}
}

function PageQuery(q) {
if(q.length > 1) this.q = q.substring(1, q.length);
else this.q = null;
this.keyValuePairs = new Array();
if(q) {
for(var i=0; i < this.q.split("&").length; i++) {
this.keyValuePairs[i] = this.q.split("&")[i];
}
}
this.getKeyValuePairs = function() { return this.keyValuePairs; }
this.getValue = function(s) {
for(var j=0; j < this.keyValuePairs.length; j++) {
if(this.keyValuePairs[j].split("=")[0] == s)
return this.keyValuePairs[j].split("=")[1];
}
return false;
}
this.getParameters = function() {
var a = new Array(this.getLength());
for(var j=0; j < this.keyValuePairs.length; j++) {
a[j] = this.keyValuePairs[j].split("=")[0];
}
return a;
}
this.getLength = function() { return this.keyValuePairs.length; }
}
function queryString(key){
var page = new PageQuery(window.location.search);
return unescape(page.getValue(key));
}