function hideshowBlock(menu)
{
	//alert(document.getElementById(menu).style.display);
	if(document.getElementById(menu).style.display=="none" ) {
		document.getElementById(menu).style.display="block";
		if (document.getElementById("topicViewControl") != null) {
			document.getElementById("topicViewControl").style.visibility = "hidden";
		}
	} 
	else {
		document.getElementById(menu).style.display="none";
		if (document.getElementById("topicViewControl") != null) {
			document.getElementById("topicViewControl").style.visibility = "visible";
		}
	}
}