function hideDiv(divName){
	tempDiv = document.getElementById(divName);
	if (!tempDiv) {
		return;
	}
	if (tempDiv.style.display=="block"){
	     tempDiv.style.display="none";
	}
}

function showDiv(divName){
	tempDiv = document.getElementById(divName);
	if (!tempDiv) {
	  return;
	}
	if (tempDiv.style.display=="none"){
		tempDiv.style.display="block";
	 }
}