function selectKlas(jaar,schoolnr,pakketnr) {
	
	if ( pakketnr != "") {
		$(" <img src=\"/site/vde/design/graphics/loading.gif\" align=\"top\"/>").insertAfter("select[@name=klaskeuze]");
		$.ajax({
			type: "POST",
			dataType: "json",
			url: "/members/ajax/klas.lasso",
			data: "sesid="+SESID+"&action=selectKlas&jaar="+encodeURIComponent(jaar)+"&schoolnr="+encodeURIComponent(schoolnr)+"&pakketnr="+encodeURIComponent(pakketnr)+"&rand="+Math.random(),
			success: function(json) {
				if ( json.status == "ERROR" ) {
					if ( json.msg == "SESSION_EXPIRED" ) {
						onSessionExpired();
					} else {
						onError(json.msg, null, false);
					}
				} else if ( json.status == "OK" ) {
					window.location.href= '/members/index.lasso?-Session=ses:' + SESID;
				}
			},
			error: function(oRequest, sErrType) {
				onError("_DEFAULT_", null, false);
			}
		});
	}
}