browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

if (browserName == "Netscape" && browserVer >= 3) version="ok";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version="ok";
else version="no";

if (version == "ok") {

m_1 = new Image();
m_1.src = "i/images_eng/m_tc_off.gif";
m_1_on = new Image();
m_1_on.src = "i/images_eng/m_tc_on.gif";

m_2 = new Image();
m_2.src = "i/images_eng/m_ai_off.gif";
m_2_on = new Image();
m_2_on.src = "i/images_eng/m_ai_on.gif";

m_3 = new Image();
m_3.src = "i/images_eng/m_iz_off.gif";
m_3_on = new Image();
m_3_on.src = "i/images_eng/m_iz_on.gif";

m_4 = new Image();
m_4.src = "i/images_eng/m_dk_off.gif";
m_4_on = new Image();
m_4_on.src = "i/images_eng/m_dk_on.gif";

m5 = new Image();
m5.src = "i/images_eng/bt_di_off.gif";
m5_on = new Image();
m5_on.src = "i/images_eng/bt_di_on.gif";


m6 = new Image();
m6.src = "i/images_eng/bt_pa_off.gif";
m6_on = new Image();
m6_on.src = "i/images_eng/bt_pa_on.gif";


m7 = new Image();
m7.src = "i/images_eng/bt_par_off.gif";
m7_on = new Image();
m7_on.src = "i/images_eng/bt_par_on.gif";


m8 = new Image();
m8.src = "i/images_eng/bt_ri_off.gif";
m8_on = new Image();
m8_on.src = "i/images_eng/bt_ri_on.gif";

m9 = new Image();
m9.src = "i/images_eng/bt_pn_off.gif";
m9_on = new Image();
m9_on.src = "i/images_eng/bt_pn_on.gif";




m10 = new Image();
m10.src = "i/images_eng/bt_fs_off.gif";
m10_on = new Image();
m10_on.src = "i/images_eng/bt_fs_on.gif";


m11 = new Image();
m11.src = "i/images_eng/bt_ps_off.gif";
m11_on = new Image();
m11_on.src = "i/images_eng/bt_ps_on.gif";

m12 = new Image();
m12.src = "i/images_eng/bt_ssc_off.gif";
m12_on = new Image();
m12_on.src = "i/images_eng/bt_ssc_on.gif";


}

function img_over(obrazek) {
if (version == "ok") {
document[obrazek].src = eval(obrazek + "_on.src");
}
}

function img_out(obrazek) {
if (version == "ok") {
document[obrazek].src = eval(obrazek + ".src");
}
}

//Preload buttonów podmiany
function preload() {
  if (!document.images) return;
  var ar = new Array();
  var arguments = preload.arguments;
  for (var i = 0; i < arguments.length; i++) {
    ar[i] = new Image();
    ar[i].src = arguments[i];
  }
}