function toggle_mapList(ladderList, objectId)
{
		var object;
		for (i=0; i<ladderList.length; i++)
		{
			object = document.getElementById(ladderList[i].value); 
			object.style.display = "none";
			//alert(object.id);
			for (j=0; j<object.options.length; j++)
			{
				object.options[j].selected = false;
			}
		}
		object = document.getElementById(objectId);
		if ( object.style.display == "none" )
		{
			object.style.display = "block";
		}
		else
		{
			object.style.display = "none";
		}
}