<!-- begin hiding script

//pre-cache rollover images for main navigation rollovers

var item = new Array();
var rollovers = new Array ("nav_about", "nav_trail", "nav_involved", "nav_contribute");

var i;
for (i=0; i<4; i++)  {
item[i] = new Image;
item[i].src = "/img/" + rollovers[i] + "_on.gif";
}


//begin main navigation rollover script

        function img_act(imgName) {

                imgOn = "/img/" + imgName + "_on.gif";
                document [imgName].src = imgOn;

        }

        function img_inact(imgName) {

                imgOff = "/img/" + imgName + "_off.gif";
                document [imgName].src = imgOff;

        }

// stop hiding script -->