if (document.images) {
  image1on = new Image();
  image1on.src = "images/buttons/b_mhome_on.gif";
  image2on = new Image();
  image2on.src = "images/buttons/b_mproducts_on.gif";
  image3on = new Image();
  image3on.src = "images/buttons/b_mtech_on.gif";
  image4on = new Image();
  image4on.src = "images/buttons/b_mcust_on.gif";
  image5on = new Image();
  image5on.src = "images/buttons/b_mprofile_on.gif";
  image6on = new Image();
  image6on.src = "images/buttons/b_mcontact_on.gif";
  image7on = new Image();
  image7on.src = "images/buttons/b_mnews_on.gif";
  image8on = new Image();
  image8on.src = "images/buttons/b_mhome_on.gif";
  image9on = new Image();
  image9on.src = "images/buttons/b_mproducts_on.gif";
  image10on = new Image();
  image10on.src = "images/buttons/b_mtech_on.gif";
  image11on = new Image();
  image11on.src = "images/buttons/b_mcust_on.gif";
  image12on = new Image();
  image12on.src = "images/buttons/b_mprofile_on.gif";
  image13on = new Image();
  image13on.src = "images/buttons/b_mcontact_on.gif";
  image14on = new Image();
  image14on.src = "images/buttons/b_mnews_on.gif";
  image1off = new Image();
  image1off.src = "images/buttons/b_mhome_off.gif";
  image2off = new Image();
  image2off.src = "images/buttons/b_mproducts_off.gif";
  image3off = new Image();
  image3off.src = "images/buttons/b_mtech_off.gif";
  image4off = new Image();
  image4off.src = "images/buttons/b_mcust_off.gif";
  image5off = new Image();
  image5off.src = "images/buttons/b_mprofile_off.gif";
  image6off = new Image();
  image6off.src = "images/buttons/b_mcontact_off.gif";
  image7off = new Image();
  image7off.src = "images/buttons/b_mnews_off.gif";
  image8off = new Image();
  image8off.src = "images/buttons/b_mhome_off.gif";
  image9off = new Image();
  image9off.src = "images/buttons/b_mproducts_off.gif";
  image10off = new Image();
  image10off.src = "images/buttons/b_mtech_off.gif";
  image11off = new Image();
  image11off.src = "images/buttons/b_mcust_off.gif";
  image12off = new Image();
  image12off.src = "images/buttons/b_mprofile_off.gif";
  image13off = new Image();
  image13off.src = "images/buttons/b_mcontact_off.gif";
  image14off = new Image();
  image14off.src = "images/buttons/b_mnews_off.gif";
  image15on = new Image();
  image15on.src = "images/buttons/b_msitemap_on.gif";
  image15off = new Image();
  image15off.src = "images/buttons/b_msitemap_off.gif";
  image16on = new Image();
  image16on.src = "images/buttons/b_msitemap_on.gif";
  image16off = new Image();
  image16off.src = "images/buttons/b_msitemap_off.gif";
  image17on = new Image();
  image17on.src = "images/buttons/description_on.gif";
  image18on = new Image();
  image18on.src = "images/buttons/theory_on.gif";
  image19on = new Image();
  image19on.src = "images/buttons/applications_on.gif";
  image20on = new Image();
  image20on.src = "images/buttons/options_on.gif";
  image21on = new Image();
  image21on.src = "images/buttons/specifications_on.gif";
  image22on = new Image();
  image22on.src = "images/buttons/s4appforwin_on.gif";
  image23on = new Image();
  image23on.src = "images/buttons/s4cmappsw_on.gif";
  image24on = new Image();
  image24on.src = "images/buttons/s4tmsw_on.gif";
  image25on = new Image();
  image25on.src = "images/buttons/waveforwin_on.gif";
  image26on = new Image();
  image26on.src = "images/buttons/s4aupgrade_on.gif";
  image17off = new Image();
  image17off.src = "images/buttons/description_off.gif";
  image18off = new Image();
  image18off.src = "images/buttons/theory_off.gif";
  image19off = new Image();
  image19off.src = "images/buttons/applications_off.gif";
  image20off = new Image();
  image20off.src = "images/buttons/options_off.gif";
  image21off = new Image();
  image21off.src = "images/buttons/specifications_off.gif";
  image22off = new Image();
  image22off.src = "images/buttons/s4appforwin_off.gif";
  image23off = new Image();
  image23off.src = "images/buttons/s4cmappsw_off.gif";
  image24off = new Image();
  image24off.src = "images/buttons/s4tmsw_off.gif";
  image25off = new Image();
  image25off.src = "images/buttons/waveforwin_off.gif";
  image26off = new Image();
  image26off.src = "images/buttons/s4aupgrade_off.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");
    }
  }
}