/*    
var _off = new Image();
_off.src = 'images/nav__off.jpg';
var _on = new Image();
_on.src = 'images/nav__on.jpg';
*/        

var about_off = new Image();
about_off.src = 'images/nav_about_off.jpg';
var about_on = new Image();
about_on.src = 'images/nav_about_on.jpg';

var prod_off = new Image();
prod_off.src = 'images/nav_prod_off.jpg';
var prod_on = new Image();
prod_on.src = 'images/nav_prod_on.jpg';

var mark_off = new Image();
mark_off.src = 'images/nav_mark_off.jpg';
var mark_on = new Image();
mark_on.src = 'images/nav_mark_on.jpg';

var spec_off = new Image();
spec_off.src = 'images/nav_spec_off.jpg';
var spec_on = new Image();
spec_on.src = 'images/nav_spec_on.jpg';

var contact_off = new Image();
contact_off.src = 'images/nav_contact_off.jpg';
var contact_on = new Image();
contact_on.src = 'images/nav_contact_on.jpg';

var home3_off = new Image();
home3_off.src = 'images/nav_home_off3.jpg';
var home3_on = new Image();
home3_on.src = 'images/nav_home_on3.jpg';

var about3_off = new Image();
about3_off.src = 'images/nav_about_off3.jpg';
var about3_on = new Image();
about3_on.src = 'images/nav_about_on3.jpg';

var prod3_off = new Image();
prod3_off.src = 'images/nav_prod_off3.jpg';
var prod3_on = new Image();
prod3_on.src = 'images/nav_prod_on3.jpg';

var desc3_off = new Image();
desc3_off.src = 'images/nav_desc_off3.jpg';
var desc3_on = new Image();
desc3_on.src = 'images/nav_desc_on3.jpg';

var mark3_off = new Image();
mark3_off.src = 'images/nav_mark_off3.jpg';
var mark3_on = new Image();
mark3_on.src = 'images/nav_mark_on3.jpg';

var roi3_off = new Image();
roi3_off.src = 'images/nav_roi_off3.jpg';
var roi3_on = new Image();
roi3_on.src = 'images/nav_roi_on3.jpg';

var spec3_off = new Image();
spec3_off.src = 'images/nav_spec_off3.jpg';
var spec3_on = new Image();
spec3_on.src = 'images/nav_spec_on3.jpg';


var abouthome_off = new Image();
abouthome_off.src = 'images/nav_about_offhome.jpg';
var abouthome_on = new Image();
abouthome_on.src = 'images/nav_about_onhome.jpg';

var prodhome_off = new Image();
prodhome_off.src = 'images/nav_prod_offhome.jpg';
var prodhome_on = new Image();
prodhome_on.src = 'images/nav_prod_onhome.jpg';

var deschome_off = new Image();
deschome_off.src = 'images/nav_desc_offhome.jpg';
var deschome_on = new Image();
deschome_on.src = 'images/nav_desc_onhome.jpg';

var markhome_off = new Image();
markhome_off.src = 'images/nav_mark_offhome.jpg';
var markhome_on = new Image();
markhome_on.src = 'images/nav_mark_onhome.jpg';

var roihome_off = new Image();
roihome_off.src = 'images/nav_roi_offhome.jpg';
var roihome_on = new Image();
roihome_on.src = 'images/nav_roi_onhome.jpg';

var spechome_off = new Image();
spechome_off.src = 'images/nav_spec_offhome.jpg';
var spechome_on = new Image();
spechome_on.src = 'images/nav_spec_onhome.jpg';



   
function rollOn(imgname) {
	if (imgname == "") {
		return;	
	}
	if (document.images) {
  	document.images[imgname].src = eval(imgname + '_on.src');
  } 
}
    
function rollOff(imgname) {
	if (imgname == "") {
		return;	
	}
	if (document.images) {
  	document.images[imgname].src = eval(imgname + '_off.src');
  } 
}

function screenShot(which){
	path = "images/" + which;
	window.open(path,"","width=760,height=500,status=1,scrollbars=1,resizable=1,menubar=1")
}