function showhidetag(tagid){
	el=document.getElementById(tagid).style; 
	el.display=(el.display == 'block')?'none':'block';
	}

function showhidemenu(menuitemid,onoff)
	{
	var scr = menuitemid;
	if (Boolean(document.getElementById)){
	    var obj = document.getElementById(scr);
	    (onoff) ? obj.style.visibility='visible' : obj.style.visibility='hidden';
	    }
	}