var prevObject=null;
//<![CDATA[
function HideandUNhideObj(ThisObj){
	nav=document.getElementById(ThisObj).style
		if(nav.display=="none"){
			if (prevObject != null){
				prevObject.style.display='none';
			}
			nav.display='block';
			prevObject=document.getElementById(ThisObj);

		}else{
			nav.display='none';
		}

}
//]]>