if(document.images)  {

homeoff = new Image();
homeoff.src = "images/homeoff.jpg";
homeon = new Image();
homeon.src = "images/homeon.jpg";

manufacturersoff = new Image();
manufacturersoff.src = "images/manufacturersoff.jpg";
manufacturerson = new Image();
manufacturerson.src = "images/manufacturerson.jpg";

companyoff = new Image();
companyoff.src = "images/companyoff.jpg";
companyon = new Image();
companyon.src = "images/companyon.jpg";

industrylinksoff = new Image();
industrylinksoff.src = "images/industrylinksoff.jpg";
industrylinkson = new Image();
industrylinkson.src = "images/industrylinkson.jpg";

contactoff = new Image();
contactoff.src = "images/contactoff.jpg";
contacton = new Image();
contacton.src = "images/contacton.jpg";

warehouseoff = new Image();
warehouseoff.src = "images/warehouseoff.jpg";
warehouseon = new Image();
warehouseon.src = "images/warehouseon.jpg";

} 

function onoff(imgName,state) {
        if(document.images) {               
		document.images[imgName].src = eval(imgName+state+".src");
        }
}