// JavaScript Document
function blockOnOff(varA,varB,varC,varD){
	document.getElementById(varA).style.display = "block";
	document.getElementById(varB).style.display = "none";
	if(varC!="") document.getElementById(varC).style.display = "block";
	if(varD!="") document.getElementById(varD).style.display = "none";
}