var abouton = new Image;
abouton.src = "../img/nav/4ventures-home-icon-hover.gif";
var aboutoff = new Image;
aboutoff.src = "../img/nav/4ventures-home-icon.gif";	
	  
var companyon = new Image;
companyon.src = "../img/nav/company-home-icon-hover.gif";
var companyoff = new Image;
companyoff.src = "../img/nav/company-home-icon.gif";

var presson = new Image;
presson.src = "../img/nav/press-home-icon-hover.gif";
var pressoff = new Image;
pressoff.src = "../img/nav/press-home-icon.gif";

var careerson = new Image;
careerson.src = "../img/nav/careers-home-icon-hover.gif";
var careersoff = new Image;
careersoff.src = "../img/nav/careers-home-icon.gif";

var contacton = new Image;
contacton.src = "../img/nav/contact-home-icon-hover.gif";
var contactoff = new Image;
contactoff.src = "../img/nav/contact-home-icon.gif";	
	  
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
       }
}

function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}