var selected = [false, false, false, false];
    
    function recordclick(i)
    {
        if (i == 0) // special case
        {
            var panelA = document.getElementById("panel_0A");
            var panelB = document.getElementById("panel_0B");
            
            if (selected[0])
            {
                panelA.style.visibility = "visible";
                panelB.style.visibility = "hidden"; 
            }
            else
            {
                panelB.style.visibility = "visible";
                panelA.style.visibility = "hidden"; 
            }
       }
        else
        {
            var panel = document.getElementById("panel_" + i);

            //alert(i);
            if (selected[i]) 
            {
                panel.style.visibility = "hidden";
                //document.getElementById("SearchPanelControl_imgLocation").style.visibility = "hidden";
            }
            else
            {
                panel.style.visibility = "visible";
            }
        }
        selected[i] = !selected[i];
        
        // get textBox
        var tb = document.getElementById("ctl00_SearchPanelControl_mapData");
        
        s = "";
        
        for (i = 0; i<4; i++)
        {
            if (selected[i])
            { 
                s = s + "1";
            }
            else
            {
                s = s + "0";
            }
        }
        tb.value = s;
    }
    
    
    
    function initialise(s)
    {
        for (i=0; i<s.length; i++)
        {        
            if (s.charAt(i) == '1')
            {
                //alert(i);
                recordclick(i);
            }
        }
    }