function toggleDisplay(layerID)
    {
        var oStyle = getStyleObject(layerID);
        if(oStyle.display != 'block')
        {
            oStyle.display = 'block';
        }
        else
        {
            oStyle.display = 'none';
        }
    }
    
    function toggleDisplayIcon(layerID)
    {
        var oStyle = getStyleObject(layerID);
        
        var oElem = getObject("displayIcon_" + layerID);
        
        if(oStyle.display != 'block')
        { 
            oElem.src ="http://www.allclassical.org/blog/images/img_icon_up.gif";
        }
        else
        {
            oElem.src ="http://www.allclassical.org/blog/images/img_icon_down.gif";
        }
        

    
    }