if (document.images) {

whatsnewon = new Image();
whatsnewon.src = "new_images/1-2-ON.jpg";
whatsnewoff = new Image();
whatsnewoff.src = "new_images/1-2.jpg";

aboutuson = new Image();
aboutuson.src = "new_images/2-2-ON.jpg";
aboutusoff = new Image();
aboutusoff.src = "new_images/2-2.jpg";

showcaseon = new Image();
showcaseon.src = "new_images/2-3-ON.jpg";
showcaseoff = new Image();
showcaseoff.src = "new_images/2-3.jpg";

literatureon = new Image();
literatureon.src = "new_images/2-4-ON.jpg";
literatureoff = new Image();
literatureoff.src = "new_images/2-4.jpg";

resourceson = new Image();
resourceson.src = "new_images/2-5-ON.jpg";
resourcesoff = new Image();
resourcesoff.src = "new_images/2-5.jpg";

howtobuyon = new Image();
howtobuyon.src = "new_images/2-6-ON.jpg";
howtobuyoff = new Image();
howtobuyoff.src = "new_images/2-6.jpg";

contacton = new Image();
contacton.src = "new_images/2-7-ON.jpg";
contactoff = new Image();
contactoff.src = "new_images/2-7.jpg";

loginon = new Image();
loginon.src = "new_images/3-1-ON.jpg";
loginoff = new Image();
loginoff.src = "new_images/3-1.jpg";

homeon = new Image();
homeon.src = "new_images/4-1-ON.jpg";
homeoff = new Image();
homeoff.src = "new_images/4-1.jpg";

privatefireon = new Image();
privatefireon.src = "new_images/4-3-ON.jpg";
privatefireoff = new Image();
privatefireoff.src = "new_images/4-3.jpg";

waterdiston = new Image();
waterdiston.src = "new_images/5-2-ON.jpg";
waterdistoff = new Image();
waterdistoff.src = "new_images/5-2.jpg";

reswateron = new Image();
reswateron.src = "new_images/6-1-ON.jpg";
reswateroff = new Image();
reswateroff.src = "new_images/6-1.jpg";

agwateron = new Image();
agwateron.src = "new_images/7-1-ON.jpg";
agwateroff = new Image();
agwateroff.src = "new_images/7-1.jpg";

indliquidon = new Image();
indliquidon.src = "new_images/8-1-ON.jpg";
indliquidoff = new Image();
indliquidoff.src = "new_images/8-1.jpg";

ammoniaon = new Image();
ammoniaon.src = "new_images/9-1-ON.jpg";
ammoniaoff = new Image();
ammoniaoff.src = "new_images/9-1.jpg";

wastewateron = new Image();
wastewateron.src = "new_images/10-1-ON.jpg";
wastewateroff = new Image();
wastewateroff.src = "new_images/10-1.jpg";

complianceon = new Image();
complianceon.src = "new_images/11-1-ON.jpg";
complianceoff = new Image();
complianceoff.src = "new_images/11-1.jpg";

tanks1imagedefault = new Image();
tanks2imagedefault = new Image();
tanks3imagedefault = new Image();

tanks1imagedefault.src = "new_images/tanks-1-default.jpg";
tanks2imagedefault.src = "new_images/tanks-2-default.jpg";
tanks3imagedefault.src = "new_images/tanks-3-default.jpg";

tanks1imagebolted = new Image();
tanks2imagebolted = new Image();
tanks3imagebolted = new Image();

tanks1imagebolted.src = "new_images/tanks-1-bolted.jpg";
tanks2imagebolted.src = "new_images/tanks-2-bolted.jpg";
tanks3imagebolted.src = "new_images/tanks-3-bolted.jpg";

tanks1imagecorrugated = new Image();
tanks2imagecorrugated = new Image();
tanks3imagecorrugated = new Image();

tanks1imagecorrugated.src = "new_images/tanks-1-corrugated.jpg";
tanks2imagecorrugated.src = "new_images/tanks-2-corrugated.jpg";
tanks3imagecorrugated.src = "new_images/tanks-3-corrugated.jpg";

tanks1imagecustom = new Image();
tanks2imagecustom = new Image();
tanks3imagecustom = new Image();

tanks1imagecustom.src = "new_images/tanks-1-custom.jpg";
tanks2imagecustom.src = "new_images/tanks-2-custom.jpg";
tanks3imagecustom.src = "new_images/tanks-3-custom.jpg";

tanks1imagedoublewall = new Image();
tanks2imagedoublewall = new Image();
tanks3imagedoublewall = new Image();

tanks1imagedoublewall.src = "new_images/tanks-1-doublewall.jpg";
tanks2imagedoublewall.src = "new_images/tanks-2-doublewall.jpg";
tanks3imagedoublewall.src = "new_images/tanks-3-doublewall.jpg";

tanks1imagewelded = new Image();
tanks2imagewelded = new Image();
tanks3imagewelded = new Image();

tanks1imagewelded.src = "new_images/tanks-1-welded.jpg";
tanks2imagewelded.src = "new_images/tanks-2-welded.jpg";
tanks3imagewelded.src = "new_images/tanks-3-welded.jpg";

}

function imgOn(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "on.src");
  }
}

function imgOff(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "off.src");
  }
}

function tanksOn(imgName) {
  if (document.images) {
    document.tanks1image.src = eval("tanks1image" + imgName + ".src");
    document.tanks2image.src = eval("tanks2image" + imgName + ".src");
    document.tanks3image.src = eval("tanks3image" + imgName + ".src");
    return true;
  }
}