function fCheckForm(f) {
	var mistake=false;
	var msgwrong=f.msgwrong.value;
	if (f.verplicht.value){
		var arrobliged=f.verplicht.value.split(',');
		for (i=0;i<=arrobliged.length-1;i++) {
			var x=arrobliged[i].toLowerCase();
			mistake=(eval('f.' + arrobliged[i] + '.' + 'value')=='');
			if (mistake) break;
		}
		if (mistake){ 
			eval('f.' + arrobliged[i] + '.' +  'focus()');
			alert(msgwrong);
			return false;
		} else {
			return true;
		}
	}else{
		return true;
	}
}
function addClass(el, sClass){
    sClassName = el.className + " " + sClass;
    el.className = sClassName;
}
function removeClass(el, sClass){
    el.className = el.className.replace(" " + sClass,"");
    el.className = el.className.replace(sClass + " ","");
    el.className = el.className.replace(sClass,"");
}
function querySt(ji) {
	hu = window.location.search.substring(1);
	gy = hu.split("&");
	for (i=0;i<gy.length;i++) {
		ft = gy[i].split("=");
		if (ft[0] == ji) {
			return ft[1];
		}
	}
	return "";
}
function changeLang(){
	var lang = querySt("lang");

		if (lang!=""){
			if (lang==1){
				location.href=location.pathname;
			}else{
				location.href=location.pathname + "?lang=1";
			}
		}else{
			location.href=location.pathname + "?lang=1";
		}

}
function getLangImg(){
		var lang = querySt("lang");

		if (lang!=""){
			if (lang==1){
				document.getElementById("langlink").innerHTML = "<img src='../uploaddir/ori/nl.jpg' title='nederlands' />&nbsp;&nbsp;&nbsp;"
			}else{
				document.getElementById("langlink").innerHTML = "<img src='../uploaddir/ori/uk.jpg' title='english' />&nbsp;&nbsp;&nbsp;"
			}
		}else{
			document.getElementById("langlink").innerHTML = "<img src='../uploaddir/ori/uk.jpg' title='english' />&nbsp;&nbsp;&nbsp;"
		}
}