var oMapImagesCached = false;
var oDefaultMapImage;
var oQldMapImage;
var oNswMapImage;
var oVicMapImage;
var oWaMapImage;
var oSaMapImage;

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


function cacheMapImages()
{
    if (oMapImagesCached == false)
    {
        oMapImagesCached = true;
        
        oQldMapImage = document.getElementById("qld").src;
        oNswMapImage = document.getElementById("nsw").src;
        oWaMapImage = document.getElementById("wa").src;
        oSaMapImage = document.getElementById("sa").src;
        oVicMapImage = document.getElementById("vic").src;
        oDefaultMapImage = document.getElementById("defaultMap").src;
    }
}

function displayContact(index)
{

    var ctlId;
    var mapImageSrc;
    
    cacheMapImages();        
            
    switch (index)
    {
        case 1:
            ctlId = "qldPanel";
            mapImageSrc = oQldMapImage;
            break;
        case 2:
            ctlId = "nswPanel";
            mapImageSrc = oNswMapImage;
            break;
        case 3:
            ctlId = "waPanel";
            mapImageSrc = oWaMapImage;
            break;
        case 4:
            ctlId = "vicPanel";
            mapImageSrc = oVicMapImage;
            break;
        case 5:
            ctlId = "saPanel";
            mapImageSrc = oSaMapImage;
            break;
        default:                
            ctlId = "defaultMap";
            mapImageSrc = oDefaultMapImage;
            break;
    }
    
    changeMapImage(mapImageSrc);
    document.getElementById("nswPanel").style.display = "none";
    document.getElementById("qldPanel").style.display = "none";
    document.getElementById("vicPanel").style.display = "none";
    document.getElementById("saPanel").style.display = "none";
    document.getElementById("waPanel").style.display = "none";
    document.getElementById(ctlId).style.display = "block";
    
}

function restoreDisplay()
{
    changeMapImage(oDefaultMapImage); 
}