function $(x) {
	if (document.getElementById) return document.getElementById(x);
	else if (document.all) return document.all[x];
	else if (document.layers) return document.layers[x];
	else return null;
}

function Show(id) {

	var div = $(id);

	if(div == null){
		alert("Oeps.. Er is iets mis gegaan!");
		return false;
	}

	
	div.style.display = "block";
}

function Hide(id) {

	var div = $(id);

	if(div == null){
		alert("Oeps.. Er is iets mis gegaan!");
		return false;
	}

	
	div.style.display = "none";
}

function emptyValue(id, text) {
	if(id.value == text) {
		id.value = '';
	}
}

function blurValue(id, text) {
	if(id.value == "") {
		id.value = text;
	}
}