if (document.images)
{
missionnav = new Image;
missionnav_roll = new Image;
specialtiesnav = new Image;
specialtiesnav_roll = new Image;
portfolionav = new Image;
portfolionav_roll = new Image;
contactnav = new Image;
contactnav_roll = new Image;

missionnav.src = "image/nav_sec/mission.gif";
missionnav_roll.src = "image/nav_sec/mission_roll.gif";
specialtiesnav.src = "image/nav_sec/specialties.gif";
specialtiesnav_roll.src = "image/nav_sec/specialties_roll.gif";
portfolionav.src = "image/nav_sec/portfolio.gif";
portfolionav_roll.src = "image/nav_sec/portfolio_roll.gif";
contactnav.src = "image/nav_sec/contact.gif";
contactnav_roll.src = "image/nav_sec/contact_roll.gif";
}

else
{
mission = "";
mission_roll = "";
mission.home.src = "";
specialties = "";
specialties_roll = "";
specialties.home.src = "";
portfolio = "";
portfolio_roll = "";
portfolio.home.src = "";
contact = "";
contact_roll = "";
contact.home.src = "";
}