if (isBrowser) {

	//nav roll-over images
	image1on = new Image();
  	image1on.src = "img/industry_on.gif";
	image1off = new Image();
	image1off.src = "img/industry_off.gif";

	image2on = new Image();
  	image2on.src = "img/solutions_on.gif";
	image2off = new Image();
	image2off.src = "img/solutions_off.gif";
       
	image3on = new Image();
  	image3on.src = "img/ovp_on.gif";
	image3off = new Image();
	image3off.src = "img/ovp_off.gif";

	image4on = new Image();
  	image4on.src = "img/training_on.gif";
	image4off = new Image();
	image4off.src = "img/training_off.gif";
	
	image5on = new Image();
  	image5on.src = "img/support_on.gif";
	image5off = new Image();
	image5off.src = "img/support_off.gif";
	
	image6on = new Image();
  	image6on.src = "img/partners_on.gif";
	image6off = new Image();
	image6off.src = "img/partners_off.gif";
	
	//sub nav roll-over images
	imagesub1on = new Image();
  	imagesub1on.src = "img/sub_industry_on.gif";
	imagesub1off = new Image();
	imagesub1off.src = "img/sub_industry_off.gif";

	imagesub2on = new Image();
  	imagesub2on.src = "img/sub_solutions_on.gif";
	imagesub2off = new Image();
	imagesub2off.src = "img/sub_solutions_off.gif";
       
	imagesub3on = new Image();
  	imagesub3on.src = "img/sub_ovp_on.gif";
	imagesub3off = new Image();
	imagesub3off.src = "img/sub_ovp_off.gif";

	imagesub4on = new Image();
  	imagesub4on.src = "img/sub_training_on.gif";
	imagesub4off = new Image();
	imagesub4off.src = "img/sub_training_off.gif";
	
	imagesub5on = new Image();
  	imagesub5on.src = "img/sub_support_on.gif";
	imagesub5off = new Image();
	imagesub5off.src = "img/sub_support_off.gif";
	
	imagesub6on = new Image();
  	imagesub6on.src = "img/sub_partners_on.gif";
	imagesub6off = new Image();
	imagesub6off.src = "img/sub_partners_off.gif";

	}

function picOn(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName + 'on.src');
		}
	}


function picOff(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName + 'off.src');
		}
	}