image1on = "";
 image1off = "";
 image2on = "";
 image2off = "";
 image3on = "";
 image3off = "";
 image4on = "";
 image4off = "";
 image5on = "";
 image5off = "";
 image6on = "";
 image6off = "";

if (document.images) {

 image1on = new Image();
 image1on.src = "imagens/Btn_Apres_Click.gif";
 image1off = new Image();
 image1off.src = "imagens/Btn_Apres.gif";

 image2on = new Image();
 image2on.src = "imagens/Btn_Programacao_Click.gif";
 image2off = new Image();
 image2off.src = "imagens/Btn_Programacao.gif";

 image3on = new Image();
 image3on.src = "imagens/Btn_TPrograma_Click.gif";
 image3off = new Image();
 image3off.src = "imagens/Btn_TPrograma.gif";

 image4on = new Image();
 image4on.src = "imagens/Btn_Contato_Click.gif";
 image4off = new Image();
 image4off.src = "imagens/Btn_Contato.gif";

 image5on = new Image();
 image5on.src = "imagens/Btn_Chat_Click.gif";
 image5off = new Image();
 image5off.src = "imagens/Btn_Chat.gif";

 image6on = new Image();
 image6on.src = "imagens/Btn_Parceiros_Click.gif";
 image6off = new Image();
 image6off.src = "imagens/Btn_Parceiros.gif";

}
function changeImages() {
 if (document.images) {
  for (var i=0; i<changeImages.arguments.length; i+=2) {
   document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
  }
 }
}