if (document.images)  
{
batchu = new Image; batchu.src = "images/batch.gif";
batcho = new Image; batcho.src = "images/batcho.gif";
vacuumu = new Image; vacuumu.src = "images/vacuum.gif";
vacuumo = new Image; vacuumo.src = "images/vacuumo.gif";
rotaryu = new Image; rotaryu.src = "images/rotary.gif";
rotaryo = new Image; rotaryo.src = "images/rotaryo.gif";
meshu = new Image; meshu.src = "images/mesh.gif";
mesho = new Image; mesho.src = "images/mesho.gif";
cryogenicsu = new Image; cryogenicsu.src = "images/cryogenics.gif";
cryogenicso = new Image; cryogenicso.src = "images/cryogenicso.gif";
metalu = new Image; metalu.src = "images/metal.gif";
metalo = new Image; metalo.src = "images/metalo.gif";
transportationu = new Image; transportationu.src = "images/transportation.gif";
transportationo = new Image; transportationo.src = "images/transportationo.gif";
customeru = new Image; customeru.src = "images/customer.gif";
customero = new Image; customero.src = "images/customero.gif";
}
else {
batchu = "";
batcho = "";
vacuumu = ""; 
vacuumo = "";
rotaryu = ""; 
rotaryo = "";
meshu = "";
mesho = "";
cryogenicsu = "";
cryogenicso = "";
metalu = "";
metalo = "";
transportationu = "";
transportationo = "";
customeru = "";
customero = "";

document.batch = "";
document.vacuum = "";
document.rotary = "";
document.mesh = "";
document.cryogenics = "";
document.metal = "";
document.transportation = "";
document.customer = "";
}