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" )
{



      	menu1_on = new Image;
        menu1_on.src = "/img/menu1_on.gif";

        menu1_off = new Image;
        menu1_off.src = "/img/menu1_off.gif"; 
        
        menu2_on = new Image;
        menu2_on.src = "/img/menu2_on.gif";

        menu2_off = new Image;
        menu2_off.src = "/img/menu2_off.gif"; 
        
        menu3_on = new Image;
        menu3_on.src = "/img/menu3_on.gif";

        menu3_off = new Image;
        menu3_off.src = "/img/menu3_off.gif"; 
        
        menu4_on = new Image;
        menu4_on.src = "/img/menu4_on.gif";

        menu4_off = new Image;
        menu4_off.src = "/img/menu4_off.gif"; 
        
        menu5_on = new Image;
        menu5_on.src = "/img/menu5_on.gif";

        menu5_off = new Image;
        menu5_off.src = "/img/menu5_off.gif"; 

		menu6_on = new Image;
        menu6_on.src = "/img/menu6_on.gif";

        menu6_off = new Image;
        menu6_off.src = "/img/menu6_off.gif"; 

      	menu7_on = new Image;
        menu7_on.src = "/img/menu7_on.gif";

        menu7_off = new Image;
        menu7_off.src = "/img/menu7_off.gif"; 

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