if (document.images) {         
	img1on = new Image();      
    img1on.src = "images/nav_01-over.jpg"; 
	img2on = new Image();      
    img2on.src = "images/nav_02-over.jpg"; 
	img3on = new Image();      
    img3on.src = "images/nav_03-over.jpg"; 
	img4on = new Image();      
    img4on.src = "images/nav_04-over.jpg"; 
	img5on = new Image();      
    img5on.src = "images/nav_05-over.jpg";
	img6on = new Image();      
    img6on.src = "images/subnav_aboutus-01-over.gif";
	img7on = new Image();      
    img7on.src = "images/subnav_aboutus-02-over.gif";
	img8on = new Image();      
    img8on.src = "images/subnav_aboutus-03-over.gif";
	img9on = new Image();      
    img9on.src = "images/subnav_aboutus-04-over.gif";
	img10on = new Image();      
    img10on.src = "images/subnav_resources-01-over.gif";
	img11on = new Image();      
    img11on.src = "images/subnav_resources-02-over.gif";
	img12on = new Image();      
    img12on.src = "images/subnav_resources-03-over.gif";
	img13on = new Image();      
    img13on.src = "images/subnav_support-01-over.gif";
	img14on = new Image();      
    img14on.src = "images/subnav_support-02-over.gif";
	img15on = new Image();      
    img15on.src = "images/katrina-hurricane-over.gif";
	
  
   img1off = new Image();      
    img1off.src = "images/nav_01.jpg"; 
	img2off = new Image();      
    img2off.src = "images/nav_02.jpg"; 
	img3off = new Image();      
    img3off.src = "images/nav_03.jpg"; 
	img4off = new Image();      
    img4off.src = "images/nav_04.jpg"; 
	img5off = new Image();      
    img5off.src = "images/nav_05.jpg";
	img6off = new Image();      
    img6off.src = "images/subnav_aboutus-01.gif";
	img7off = new Image();      
    img7off.src = "images/subnav_aboutus-02.gif";
	img8off = new Image();      
    img8off.src = "images/subnav_aboutus-03.gif";
	img9off = new Image();      
    img9off.src = "images/subnav_aboutus-04.gif";
	img10off = new Image();      
    img10off.src = "images/subnav_resources-01.gif";
	img11off = new Image();      
    img11off.src = "images/subnav_resources-02.gif";
	img12off = new Image();      
    img12off.src = "images/subnav_resources-03.gif";
	img13off = new Image();      
    img13off.src = "images/subnav_support-01.gif";
	img14off = new Image();      
    img14off.src = "images/subnav_support-02.gif";
	img15off = new Image();      
    img15off.src = "images/katrina-hurricane-relief.gif";
}


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");
        }
}