if(document.images) {
        
        var  home1 = new Image();
        var  home2 = new Image();
        var  aboutus1 = new Image();
        var  aboutus2 = new Image();
        var  contact1 = new Image();
        var  contact2 = new Image();
        var  toc1 = new Image();
        var  toc2 = new Image();
        var  new1 = new Image();
		var  new2 = new Image();
        var  careers1 = new Image();
		var  careers2 = new Image(); 
		
     home1.src = "/images/cat_subnav_home_off.jpg";
     home2.src = "/images/cat_subnav_home_on.jpg";
     aboutus1.src = "/images/cat_subnav_aboutus_off.jpg";
     aboutus2.src = "/images/cat_subnav_aboutus_on.jpg";
     contact1.src = "/images/cat_subnav_contact_off.jpg";
     contact2.src = "/images/cat_subnav_contact_on.jpg";
     toc1.src = "/images/cat_subnav_toc_off.jpg";
     toc2.src = "/images/cat_subnav_toc_on.jpg";
	 new1.src = "/images/button_new_off.gif";
     new2.src = "/images/button_new_on.gif";
     careers1.src = "images/cat_subnav_careers_off.jpg";
     careers2.src = "images/cat_subnav_careers_on.jpg";   
	 

}
function off(imgName,imgName2) {
        if(document.getElementById(imgName))
        document.getElementById(imgName).src = eval(imgName2 + '1.src');
}
function on(imgName,imgName2) {
        if(document.getElementById(imgName))
        document.getElementById(imgName).src = eval(imgName2 + '2.src');
}


function hiLite(imgDocID, imgObjName) {
    if (document.getElementById(imgDocID)) {
		document.getElementById(imgDocID).src = eval(imgObjName + ".src");
	}
}