if (document.images) {
//main name rollovers
about_off = new Image()
about_off.src = "images/nav_about.gif"
about_over = new Image()
about_over.src = "images/nav_about_on.gif"

portfolio_off = new Image()
portfolio_off.src = "images/nav_portfolio.gif"
portfolio_over = new Image()
portfolio_over.src = "images/nav_portfolio_on.gif"

contact_off = new Image()
contact_off.src = "images/nav_contact.gif"
contact_over = new Image()
contact_over.src = "images/nav_contact_on.gif"

//print nav rollovers
port_nav1_off = new Image()
port_nav1_off.src = "images/port_nav.gif"
port_nav1_over = new Image()
port_nav1_over.src = "images/port_nav_over.gif"

port_nav2_off = new Image()
port_nav2_off.src = "images/port_nav.gif"
port_nav2_over = new Image()
port_nav2_over.src = "images/port_nav_over.gif"

port_nav3_off = new Image()
port_nav3_off.src = "images/port_nav.gif"
port_nav3_over = new Image()
port_nav3_over.src = "images/port_nav_over.gif"

port_nav4_off = new Image()
port_nav4_off.src = "images/port_nav.gif"
port_nav4_over = new Image()
port_nav4_over.src = "images/port_nav_over.gif"

port_nav5_off = new Image()
port_nav5_off.src = "images/port_nav.gif"
port_nav5_over = new Image()
port_nav5_over.src = "images/port_nav_over.gif"

port_nav6_off = new Image()
port_nav6_off.src = "images/port_nav.gif"
port_nav6_over = new Image()
port_nav6_over.src = "images/port_nav_over.gif"

port_nav7_off = new Image()
port_nav7_off.src = "images/port_nav.gif"
port_nav7_over = new Image()
port_nav7_over.src = "images/port_nav_over.gif"

port_nav8_off = new Image()
port_nav8_off.src = "images/port_nav.gif"
port_nav8_over = new Image()
port_nav8_over.src = "images/port_nav_over.gif"

port_nav9_off = new Image()
port_nav9_off.src = "images/port_nav.gif"
port_nav9_over = new Image()
port_nav9_over.src = "images/port_nav_over.gif"

port_nav10_off = new Image()
port_nav10_off.src = "images/port_nav.gif"
port_nav10_over = new Image()
port_nav10_over.src = "images/port_nav_over.gif"

port_nav11_off = new Image()
port_nav11_off.src = "images/port_nav.gif"
port_nav11_over = new Image()
port_nav11_over.src = "images/port_nav_over.gif"

port_nav12_off = new Image()
port_nav12_off.src = "images/port_nav.gif"
port_nav12_over = new Image()
port_nav12_over.src = "images/port_nav_over.gif"

port_nav13_off = new Image()
port_nav13_off.src = "images/port_nav.gif"
port_nav13_over = new Image()
port_nav13_over.src = "images/port_nav_over.gif"

port_nav14_off = new Image()
port_nav14_off.src = "images/port_nav.gif"
port_nav14_over = new Image()
port_nav14_over.src = "images/port_nav_over.gif"

port_nav15_off = new Image()
port_nav15_off.src = "images/port_nav.gif"
port_nav15_over = new Image()
port_nav15_over.src = "images/port_nav_over.gif"

port_nav16_off = new Image()
port_nav16_off.src = "images/port_nav.gif"
port_nav16_over = new Image()
port_nav16_over.src = "images/port_nav_over.gif"

port_nav17_off = new Image()
port_nav17_off.src = "images/port_nav.gif"
port_nav17_over = new Image()
port_nav17_over.src = "images/port_nav_over.gif"

port_nav18_off = new Image()
port_nav18_off.src = "images/port_nav.gif"
port_nav18_over = new Image()
port_nav18_over.src = "images/port_nav_over.gif"

port_nav19_off = new Image()
port_nav19_off.src = "images/port_nav.gif"
port_nav19_over = new Image()
port_nav19_over.src = "images/port_nav_over.gif"

port_nav20_off = new Image()
port_nav20_off.src = "images/port_nav.gif"
port_nav20_over = new Image()
port_nav20_over.src = "images/port_nav_over.gif"

}

function RollOver(img1,ref1) {
	if (document.images) {
		document.images[img1].src = eval(ref1 + ".src")
	}
}