var netscape = 0;
	goodIE = 0;
	 n=4;
     na=4;
browserName = navigator.appName.substring(0,8);
browserVer = parseFloat(navigator.appVersion);

if (browserName == "Netscape" && browserVer >= 3)
{ netscape = 1; }
if (browserName == "Microsof" && browserVer >= 4)
{ goodIE = 1; }

if (netscape || goodIE) {
 {
	 Img= new Array(n);
	for(i=1; i<=n; i++) { Img[i] = new Image() };
   Img_on=new Array(na);
	for(i=1; i<=na; i++) { Img_on[i] = new Image() };

  Img[1].src = "images/catalog_off.gif";
	Img[2].src = "images/main_off.gif";
	Img[3].src = "images/contact_off.gif";
	Img[4].src = "images/links_off.gif";

	Img_on[1].src = "images/catalog_on.gif";
	Img_on[2].src = "images/main_on.gif";
	Img_on[3].src = "images/contact_on.gif";
	Img_on[4].src = "images/links_on.gif";


 }}                     

  function imgover(trg,imgname) {
{if (netscape || goodIE){
	 document.images[trg].src=Img_on[imgname].src;
 }}}
  
  function imgout(trg,imgname)  {
{if (netscape || goodIE){
	 document.images[trg].src=Img[imgname].src; 
 }}}