browserName = navigator.appName;
browserVer  = parseInt ( navigator.appVersion );
version     = "n2";

if ( browserName == "Netscape" && browserVer >= 3 )
    version = "n3";
if ( browserName == "Microsoft Internet Explorer" && browserVer >=4 )
    version = "e4";

if ( version == "n3" || version == "e4" )
{
    kur_on      = new Image ( );
    kur_on.src  = "images/Menu/degisken_15.gif";
    med_on      = new Image ( );
    med_on.src  = "images/Menu/degisken_16.gif";
    lin_on      = new Image ( );
    lin_on.src  = "images/Menu/degisken_17.gif";
    ist_on      = new Image ( );
    ist_on.src  = "images/Menu/degisken_18.gif";
    res_on      = new Image ( );
    res_on.src  = "images/Menu/degisken_19.gif";
	ras_on      = new Image ( );
    ras_on.src  = "images/degisken_29.gif";
	tas_on      = new Image ( );
    tas_on.src  = "images/degisken_30.gif";
	tos_on      = new Image ( );
    tos_on.src  = "images/degisken_39.gif";
	kroki_on      = new Image ( );
    kroki_on.src  = "images/krokimini_70.jpg";

    
    kur_off     = new Image ( );
    kur_off.src = "images/Menu/dunyadilleri_menu_15.gif";
    med_off     = new Image ( );
    med_off.src = "images/Menu/dunyadilleri_menu_16.gif";
    lin_off     = new Image ( );
    lin_off.src = "images/Menu/dunyadilleri_menu_17.gif";
    ist_off     = new Image ( );
    ist_off.src = "images/Menu/dunyadilleri_menu_18.gif";
    res_off     = new Image ( );
    res_off.src = "images/Menu/dunyadilleri_menu_19.gif";
    ras_off     = new Image ( );
    ras_off.src = "images/Dunyadilleri_24.jpg";
	tas_off     = new Image ( );
    tas_off.src = "images/Dunyadilleri_25.jpg";
	tos_off     = new Image ( );
    tos_off.src = "images/Dunyadilleri_34.jpg";
	kroki_off     = new Image ( );
    kroki_off.src = "images/kroki2_70.gif";

}

function button_on ( imgName )
{
    if ( version == "n3" || version == "e4" )
    {
        document [imgName].src  = eval ( imgName + "_on.src" );
    }
}

function button_off ( imgName )
{
    if ( version == "n3" || version == "e4" )
    {
        document [imgName].src  = eval ( imgName + "_off.src" );
    }
}