browserName = navigator.appName;

browserVer = parseInt ( navigator.appVersion );



version = "n2";

if ( browserName == "Netscape" && browserVer >= 4 ) version = "n4";

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



if ( version == "n4" || version == "e4" )

{



        circle1_on = new Image ( 69, 19 );

        circle1_on.src = "images/menu/circle1_on.gif";

        circle2_on = new Image ( 69, 19 );

        circle2_on.src = "images/menu/circle2_on.gif";

        circle3_on = new Image ( 69, 19 );

        circle3_on.src = "images/menu/circle3_on.gif";



       


        circle1_off = new Image ( 69, 19 );

        circle1_off.src = "images/menu/circle1_off.gif";

        circle2_off = new Image ( 69, 19 );

        circle2_off.src = "images/menu/circle2_off.gif";

        circle3_off = new Image ( 69, 19 );

        circle3_off.src = "images/menu/circle3_off.gif";






}



function button_on ( imgName )

{

        if ( version == "n4" || version == "e4" )

        {

                butOn = eval ( imgName + "_on.src" );

                document [imgName].src = butOn;

        }

}



function button_off ( imgName )

{

        if ( version == "n4" || version == "e4" )

        {

                butOff = eval ( imgName + "_off.src" );

                document [imgName].src = butOff;

        }

}