function ShowOverview() {

    document.getElementById("pnlOverview").style.display = "";
    document.getElementById("ctl00_ContentPlaceHolder2_pnlGeometry").style.display = "none";
    document.getElementById("pnlSpecs").style.display = "none";
    document.getElementById("lnkOverview").className = "overview-s";
    document.getElementById("lnkSpecs").className = "specs";
    document.getElementById("ctl00_ContentPlaceHolder2_lnkGeo").className = "geo";
    
} // end function

function ShowSpecs() {

    document.getElementById("pnlOverview").style.display = "none";
    document.getElementById("ctl00_ContentPlaceHolder2_pnlGeometry").style.display = "none";
    document.getElementById("pnlSpecs").style.display = "";
    document.getElementById("lnkOverview").className = "overview";
    document.getElementById("lnkSpecs").className = "specs-s";
    document.getElementById("ctl00_ContentPlaceHolder2_lnkGeo").className = "geo";
    
} // end function

function ShowGeometry() {

    document.getElementById("pnlOverview").style.display = "none";
    document.getElementById("ctl00_ContentPlaceHolder2_pnlGeometry").style.display = "";
    document.getElementById("pnlSpecs").style.display = "none";
    document.getElementById("lnkOverview").className = "overview";
    document.getElementById("lnkSpecs").className = "specs";
    document.getElementById("ctl00_ContentPlaceHolder2_lnkGeo").className = "geo-s";

} // end function

function ShowImage(id) {

    document.getElementById("ctl00_ContentPlaceHolder2_hidImage").value = id;
    
    document.getElementById("zoomed").style.backgroundImage = "url(/image.ashx?id=" + id + "&d=l)";
    document.getElementById("ctl00_ContentPlaceHolder1_pnlMainImage").style.backgroundImage = "url(/image.ashx?id=" + id + ")";

    for (i = 0; i < document.getElementById("ctl00_ContentPlaceHolder1_pnlColours").childNodes.length; i++) {

        document.getElementById("ctl00_ContentPlaceHolder1_pnlColours").childNodes[i].className = "";
        
        if(document.getElementById("ctl00_ContentPlaceHolder1_pnlColours").childNodes[i].href.indexOf("ShowImage("+id+")")>-1)
            document.getElementById("ctl00_ContentPlaceHolder1_pnlColours").childNodes[i].className = "selected";
    
    } // end for

} // end ShowImage

function EnlargeImage() {

    window.open("/image.ashx?d=l&id=" + document.getElementById("ctl00_ContentPlaceHolder2_hidImage").value);
}

function UpdatePurchase() {

    if (document.getElementById("ctl00_ContentPlaceHolder1_ddlPurchased").value == "Other")
        document.getElementById("ctl00_ContentPlaceHolder1_txtOtherPurchaser").style.display = "visible";
    else
        document.getElementById("ctl00_ContentPlaceHolder1_txtOtherPurchaser").style.display = "hidden";
        
} // end function UpdatePurchase