var oMapImagesCached = false;
var oDefaultMapImage;
var oQldMapImage;
var oNswMapImage;
var oVicMapImage;
var oWaMapImage;
var oSaNtMapImage;
var oNzMapImage;

function changeMapImage(src)
{
    document.getElementById("MapImage").src = src;
}


function cacheMapImages()
{
    if (oMapImagesCached == false)
    {
        oMapImagesCached = true;
        
        oQldMapImage = document.getElementById("QldMapImage").src;
        oNswMapImage = document.getElementById("NswMapImage").src;
        oVicMapImage = document.getElementById("VicMapImage").src;
        oSaNtMapImage = document.getElementById("SaNtMapImage").src;
        oWaMapImage = document.getElementById("WaMapImage").src;
        oNzMapImage = document.getElementById("NzMapImage").src;
        oDefaultMapImage = document.getElementById("DefaultMapImage").src;
    }
}

function displayContact(index)
{

    var isAus;
    var ctlId;
    var mapImageSrc;
    
    cacheMapImages();        
            
    switch (index)
    {
        case 1:
            ctlId = "QldOfficeDiv";
            isAus = true;
            mapImageSrc = oQldMapImage;
            break;
        case 2:
            ctlId = "HeadOfficeDiv";
            isAus = true;
            mapImageSrc = oNswMapImage;
            break;
        case 3:
            ctlId = "VicOfficeDiv";
            isAus = true;
            mapImageSrc = oVicMapImage;
            break;
        case 5:
            ctlId = "SaOfficeDiv";
            isAus = true;
            mapImageSrc = oSaNtMapImage;
            break;
        case 6:
            ctlId = "WaOfficeDiv";
            isAus = true;
            mapImageSrc = oWaMapImage;
            break;
        case 7:
            ctlId = "NzOfficeDiv";
            isAus = false;
            mapImageSrc = oNzMapImage;
            break;
        default:                
            ctlId = "HeadOfficeDiv";
            isAus = true;             
            mapImageSrc = oDefaultMapImage;
            break;
    }
    
    changeMapImage(mapImageSrc);
    document.getElementById("HeadOfficeDiv").style.display = "none";
    document.getElementById("QldOfficeDiv").style.display = "none";
    document.getElementById("VicOfficeDiv").style.display = "none";
    document.getElementById("SaOfficeDiv").style.display = "none";
    document.getElementById("WaOfficeDiv").style.display = "none";
    document.getElementById("NzOfficeDiv").style.display = "none";
    document.getElementById(ctlId).style.display = "block";
    
    if (isAus == true)
    {
        document.getElementById("AustraliaHeader").style.display = "block";
        document.getElementById("NewZealandHeader").style.display = "none";
    }
    else
    {
        document.getElementById("AustraliaHeader").style.display = "none";
        document.getElementById("NewZealandHeader").style.display = "block";
    }

}

function restoreDisplay()
{
    changeMapImage(oDefaultMapImage); 
}