BrowserName=navigator.appName;
 BrowserVersion=parseInt(navigator.appVersion);
 if (BrowserName=="Netscape" && BrowserVersion>=3)
  useable="yes";
 else
  useable="yes";

button11=new Button("images/butt_01_off.gif","images/butt_01_on.gif");
button12=new Button("images/butt_02_off.gif","images/butt_02_on.gif");
button13=new Button("images/butt_03_off.gif","images/butt_03_on.gif");
button14=new Button("images/butt_04_off.gif","images/butt_04_on.gif");
button15=new Button("images/butt_05_off.gif","images/butt_05_on.gif");
button16=new Button("images/butt_06_off.gif","images/butt_06_on.gif");
button17=new Button("images/butt_07_off.gif","images/butt_07_on.gif");
button18=new Button("images/butt_08_off.gif","images/butt_08_on.gif");
button19=new Button("images/butt_09_off.gif","images/butt_09_on.gif");

button21=new Button("images/butt_01_eng_off.gif","images/butt_01_eng_on.gif");
button22=new Button("images/butt_02_eng_off.gif","images/butt_02_eng_on.gif");
button23=new Button("images/butt_03_eng_off.gif","images/butt_03_eng_on.gif");
button24=new Button("images/butt_04_eng_off.gif","images/butt_04_eng_on.gif");
button25=new Button("images/butt_05_eng_off.gif","images/butt_05_eng_on.gif");
button26=new Button("images/butt_06_eng_off.gif","images/butt_06_eng_on.gif");
button27=new Button("images/butt_07_eng_off.gif","images/butt_07_eng_on.gif");
button28=new Button("images/butt_08_eng_off.gif","images/butt_08_eng_on.gif");
button29=new Button("images/butt_09_eng_off.gif","images/butt_09_eng_on.gif");

button31=new Button("images/butt_01_deu_off.gif","images/butt_01_deu_on.gif");
button32=new Button("images/butt_02_deu_off.gif","images/butt_02_deu_on.gif");
button33=new Button("images/butt_03_deu_off.gif","images/butt_03_deu_on.gif");
button34=new Button("images/butt_04_deu_off.gif","images/butt_04_deu_on.gif");
button35=new Button("images/butt_05_deu_off.gif","images/butt_05_deu_on.gif");
button36=new Button("images/butt_06_deu_off.gif","images/butt_06_deu_on.gif");
button37=new Button("images/butt_07_deu_off.gif","images/butt_07_deu_on.gif");
button38=new Button("images/butt_08_deu_off.gif","images/butt_08_deu_on.gif");
button39=new Button("images/butt_09_deu_off.gif","images/butt_09_deu_on.gif");



 function Button(norm_src,sel_src)
 {
  if (useable=="yes")
  {
   this.norm=new Image();
   this.sel=new Image();
   this.norm.src=norm_src;
   this.sel.src=sel_src;
  }
 }

 function TurnToSel(ImageName)
 {
  if (useable=="yes")
  {
   NewSrc=eval(ImageName+".sel.src");
   document[ImageName].src=NewSrc;
  }
 }

 function TurnToNorm(ImageName)
 {
  if (useable=="yes")
  {
   NewSrc=eval(ImageName+".norm.src");
   document[ImageName].src=NewSrc;
  }
 }