// <!--

        var rollover_OK = "no";

        function readyToGo() {

                rollover_OK = "yes";

                }

        if (document.images) {

           var button1_OFF = new Image();
           var button1_ON  = new Image();

           var button2_OFF = new Image();
           var button2_ON  = new Image();

           var button3_OFF = new Image();
           var button3_ON  = new Image();

           var button4_OFF = new Image();
           var button4_ON  = new Image();

           var button5_OFF = new Image();
           var button5_ON  = new Image();
                    
           var button6_OFF = new Image();
           var button6_ON  = new Image();
           
           var button7_OFF = new Image();
           var button7_ON  = new Image();
           
           var button8_OFF = new Image();
           var button8_ON  = new Image();
           
           var button9_OFF = new Image();
           var button9_ON  = new Image();
           
           var button10_OFF = new Image();
           var button10_ON  = new Image();
           
           var button11_OFF = new Image();
           var button11_ON  = new Image();
           
           var button12_OFF = new Image();
           var button12_ON  = new Image();
           
           var button13_OFF = new Image();
           var button13_ON  = new Image();
           
           var button14_OFF = new Image();
           var button14_ON  = new Image();
           
           var button15_OFF = new Image();
           var button15_ON  = new Image();
           
           var button16_OFF = new Image();
           var button16_ON  = new Image();
           
           var button17_OFF = new Image();
           var button17_ON  = new Image();
           
           var button18_OFF = new Image();
           var button18_ON  = new Image();
           
           
  
           button1_OFF.src = "images/nav/met_opera_but.gif";
           button1_ON.src  = "images/nav/met_opera_but_hi.gif";

  		   button2_OFF.src = "images/nav/opera_shop_but.gif";
           button2_ON.src  = "images/nav/opera_shop_but_hi.gif";
           
           button3_OFF.src = "images/nav/guild_but.gif";
           button3_ON.src  = "images/nav/guild_but_hi.gif";
           
           button4_OFF.src = "images/nav/education_but.gif";
           button4_ON.src  = "images/nav/education_but_hi.gif";
           
           button5_OFF.src = "images/nav/opera_news_but.gif";
           button5_ON.src  = "images/nav/opera_news_but_hi.gif";
           
           
           
           button6_OFF.src = "images/nav/timeline_but.gif";
           button6_ON.src  = "images/nav/timeline_but_hi.gif";     
           
           button7_OFF.src = "images/nav/early_life_but.gif";
           button7_ON.src  = "images/nav/early_life_but_hi.gif";            
           
           button8_OFF.src = "images/nav/early_career_but.gif";
           button8_ON.src  = "images/nav/early_career_but_hi.gif";            
           
           button9_OFF.src = "images/nav/marian_met_but.gif";
           button9_ON.src  = "images/nav/marian_met_but_hi.gif";            
           
           button10_OFF.src = "images/nav/late_career_but.gif";
           button10_ON.src  = "images/nav/late_career_but_hi.gif";            
           
           button11_OFF.src = "images/nav/legacy_but.gif";
           button11_ON.src  = "images/nav/legacy_but_hi.gif"; 
           
           
           
           button12_OFF.src = "images/nav/intro_but.gif";
           button12_ON.src  = "images/nav/intro_but_hi.gif";
           
           button13_OFF.src = "images/nav/background_but.gif";
           button13_ON.src  = "images/nav/background_but_hi.gif";
           
           button14_OFF.src = "images/nav/teacher_but.gif";
           button14_ON.src  = "images/nav/teacher_but_hi.gif";
           
           button15_OFF.src = "images/nav/picture_but.gif";
           button15_ON.src  = "images/nav/picture_but_hi.gif";
           
           button16_OFF.src = "images/nav/audio_visual_but.gif";
           button16_ON.src  = "images/nav/audio_visual_but_hi.gif";
           
           button17_OFF.src = "images/nav/resources_but.gif";
           button17_ON.src  = "images/nav/resources_but_hi.gif";
           
           button18_OFF.src = "images/nav/contact_but.gif";
           button18_ON.src  = "images/nav/contact_but_hi.gif";
           
                      
  }



  function showButton(num,state) {

    if ((document.images) && (rollover_OK == "yes")) {

        document.images["button" + num].src = eval("button" + num + 
"_" + state + ".src");

    }

  }

// -->