function alert_message(vraag) {
	var zeker = confirm("Weet u zeker dat u "+vraag);
 	if (zeker) {
 		return true;
 	} else {
 		return false;
	}
}
function test_blank(id, value) {
	if (document.getElementById(id).value == "") {
		document.getElementById(id).value = value;	
		if (id == 'password') {
			document.getElementById(id).type = "text";
		}
	}
}
function login_click_event() {
	document.getElementById('login_link').style.display = "none";
	document.getElementById('login_form').style.display = "block";
}
function autosize_ckeditor(id) {
	var element = document.getElementById(id);
	height = element.scrollHeight+20;
	return height;
}