function OpenMenu(mNum)  {
    document.getElementById("menuTDBlank").style.display="none";
	for (i=1; i<=4; i++)  {
		document.getElementById("menuTD"+i).style.display="none";
		
		if (i != mNum)  {
			changeImages('menuImg' + i, 'images/menuImg' + i + '.gif');
		}
	}
	
	if (mNum != 0)  {
		document.getElementById("menuTD"+mNum).style.display="";
	}
}

function CheckUnicode(e){
	var unicode=e.keyCode? e.keyCode : e.charCode;

	if (unicode == 13)  {
		document.getElementById("form1").submit();
		return false;
	}
	else  {
		return true;
	}
}

function ShowMap(mapNum)  {
	// hide the rest of the maps
	for (i=1; i<=4; i++)  {
		if (i != mapNum)  {
//			document.getElementById("map"+i).src="images/spacer.gif";
//			document.getElementById("map"+i).style.width="0";
//			document.getElementById("map"+i).style.height="0";
			document.getElementById("divMap"+i).style.visibility="hidden";
//			document.getElementById("divMap"+i).style.height="0";
		}
	}
	
//	document.getElementById("map"+mapNum).src="images/map1.gif";
//	document.getElementById("map"+mapNum).style.width = "680";
//	document.getElementById("map"+mapNum).style.height = "390";
	document.getElementById("divMap"+mapNum).style.visibility="visible";
//	document.getElementById("divMap"+mapNum).style.height="250";
}