if (document.images) {


var agrcold = new Image();
agrcold.src = "../images/images_hof/rt_nav/nav_invch_agr_2.gif"
var chemcold = new Image();
chemcold.src = "../images/images_hof/rt_nav/nav_invch_chem_2.gif"
var commcold = new Image();
commcold.src = "../images/images_hof/rt_nav/nav_invch_comm_2.gif"
var compcold = new Image();
compcold.src = "../images/images_hof/rt_nav/nav_invch_comp_2.gif"
var eleccold = new Image();
eleccold.src = "../images/images_hof/rt_nav/nav_invch_elec_2.gif"
var imgcold = new Image();
imgcold.src = "../images/images_hof/rt_nav/nav_invch_img_2.gif"
var indcold = new Image();
indcold.src = "../images/images_hof/rt_nav/nav_invch_ind_2.gif"
var medcold = new Image();
medcold.src = "../images/images_hof/rt_nav/nav_invch_med_2.gif"
var nobcold = new Image();
nobcold.src = "../images/images_hof/rt_nav/nav_invch_nob_2.gif"
var overcold = new Image();
overcold.src = "../images/nav_overview_2.gif"

var agrhot = new Image();
agrhot.src = "../images/images_hof/rt_nav/nav_invch_agr_3.gif"
var chemhot = new Image();
chemhot.src = "../images/images_hof/rt_nav/nav_invch_chem_3.gif"
var commhot = new Image();
commhot.src = "../images/images_hof/rt_nav/nav_invch_comm_3.gif"
var comphot = new Image();
comphot.src = "../images/images_hof/rt_nav/nav_invch_comp_3.gif"
var elechot = new Image();
elechot.src = "../images/images_hof/rt_nav/nav_invch_elec_3.gif"
var imghot = new Image();
imghot.src = "../images/images_hof/rt_nav/nav_invch_img_3.gif"
var indhot = new Image();
indhot.src = "../images/images_hof/rt_nav/nav_invch_ind_3.gif"
var medhot = new Image();
medhot.src = "../images/images_hof/rt_nav/nav_invch_med_3.gif"
var nobhot = new Image();
nobhot.src = "../images/images_hof/rt_nav/nav_invch_nob_3.gif"
var overhot = new Image();
overhot.src = "../images/images_hof/rt_nav/nav_overview_3.gif"

}

 function hot(imgName) {
 
           if (document.images) 
            document.images[imgName].src = eval(imgName + 'hot.src');
          
          }

 function cold(imgName) {
          
           if (document.images)
            document.images[imgName].src = eval(imgName + 'cold.src');
          
          }