if (document.images) 
{

nav0on = new Image();
nav0on.src = "/producepro/media/btn_home_on.gif";
nav0off = new Image();
nav0off.src = "/producepro/media/btn_home_off.gif";

nav1on = new Image();
nav1on.src = "/producepro/media/btn_contact_on.gif";
nav1off = new Image();
nav1off.src = "/producepro/media/btn_contact_off.gif";

nav2on = new Image();
nav2on.src = "/producepro/media/btn_employment_on.gif";
nav2off = new Image();
nav2off.src = "/producepro/media/btn_employment_off.gif";

nav3on = new Image();
nav3on.src = "/producepro/media/btn_about_on.gif";
nav3off = new Image();
nav3off.src = "/producepro/media/btn_about_off.gif";

nav4on = new Image();
nav4on.src = "/producepro/media/btn_product_on.gif";
nav4off = new Image();
nav4off.src = "/producepro/media/btn_product_off.gif";

nav5on = new Image();
nav5on.src = "/producepro/media/btn_order_on.gif";
nav5off = new Image();
nav5off.src = "/producepro/media/btn_order_off.gif";

nav6on = new Image();
nav6on.src = "/producepro/media/btn_new_on.gif";
nav6off = new Image();
nav6off.src = "/producepro/media/btn_new_off.gif";

nav7on = new Image();
nav7on.src = "/producepro/media/btn_safety_on.gif";
nav7off = new Image();
nav7off.src = "/producepro/media/btn_safety_off.gif";

nav8on = new Image();
nav8on.src = "/producepro/media/btn_about01_on.gif";
nav8off = new Image();
nav8off.src = "/producepro/media/btn_about01_off.gif";

nav9on = new Image();
nav9on.src = "/producepro/media/btn_about02_on.gif";
nav9off = new Image();
nav9off.src = "/producepro/media/btn_about02_off.gif";

nav10on = new Image();
nav10on.src = "/producepro/media/btn_about03_on.gif";
nav10off = new Image();
nav10off.src = "/producepro/media/btn_about03_off.gif";

nav11on = new Image();
nav11on.src = "/producepro/media/btn_about04_on.gif";
nav11off = new Image();
nav11off.src = "/producepro/media/btn_about04_off.gif";

nav12on = new Image();
nav12on.src = "/producepro/media/btn_product01_on.gif";
nav12off = new Image();
nav12off.src = "/producepro/media/btn_product01_off.gif";

nav17on = new Image();
nav17on.src = "/producepro/media/btn_contact01_on.gif";
nav17off = new Image();
nav17off.src = "/producepro/media/btn_contact01_off.gif";

function twinOn(imageName1)  {
	document[imageName1].src=eval(imageName1+"on.src");
	}
 
function twinOff(imageName1,imageName2) {
	document[imageName1].src=eval(imageName1+"off.src");
	}	

}