function changeLayerVisibility(layerID){
	var layer = document.getElementById(layerID);
	if(layer.style.display == "none")
		layer.style.display = "block";
	else
		layer.style.display = "none";
		
	return false;
}

function sendForm(formID){
	document.getElementById(formID).submit();
}

function clearTextFields(elems){
	for(var dane in elems){
		document.getElementById(elems[dane]).value = "";
	}
}