if(document.images){
  about        = new Image();
  about.src     = "image/about.gif";
  about1        = new Image();
  about1.src    = "image/about_on.gif";

  tehnologe        = new Image();
  tehnologe.src     = "image/tehnologe_but2.gif";
  tehnologe1        = new Image();
  tehnologe1.src    = "image/tehnologe_but2_on.gif";
  
  idei        = new Image();
  idei.src     = "image/idei_but2.gif";
  idei1        = new Image();
  idei1.src    = "image/idei_but2_on.gif";
  
  flash        = new Image;
  flash.src     = "image/flash_but2.gif";
  flash1        = new Image();
  flash1.src    = "image/flash_but2_on.gif";
  
  halyva        = new Image();
  halyva.src     = "image/halyva_but2.gif";
  halyva1        = new Image();
  halyva1.src    = "image/halyva_but2_on.gif";
  
  programs       = new Image();
  programs.src     = "image/programs_but2.gif";
  programs1        = new Image();
  programs1.src    = "image/programs_but2_on.gif";
}


  function showImage(name) {
    document.images[name].src = eval(name + "1.src");
  }

  function hideImage(name) {
    document.images[name].src = eval(name + ".src");
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function win() {

window.open("mail/index.php","","height=400,width=500,left=80,top=80");

}