hillcrest_01_on = new Image();
hillcrest_02_on = new Image();
hillcrest_03_on = new Image();
hillcrest_04_on = new Image();
hillcrest_05_on = new Image();
hillcrest_06_on = new Image();
hillcrest_07_on = new Image();
hillcrest_08_on = new Image();

hillcrest_01_off = new Image();
hillcrest_02_off = new Image();
hillcrest_03_off = new Image();
hillcrest_04_off = new Image();
hillcrest_05_off = new Image();
hillcrest_06_off = new Image();
hillcrest_07_off = new Image();
hillcrest_08_off = new Image();

hillcrest_01_on.src = "../images/navigation-dn_01.gif";
hillcrest_02_on.src = "../images/navigation-dn_02.gif";
hillcrest_03_on.src = "../images/navigation-dn_03.gif";
hillcrest_04_on.src = "../images/navigation-dn_04.gif";
hillcrest_05_on.src = "../images/navigation-dn_05.gif";
hillcrest_06_on.src = "../images/navigation-dn_06.gif";
hillcrest_07_on.src = "../images/navigation-dn_07.gif";
hillcrest_08_on.src = "../images/navigation-dn_08.gif";

hillcrest_01_off.src = "../images/navigation_01.gif";
hillcrest_02_off.src = "../images/navigation_02.gif";
hillcrest_03_off.src = "../images/navigation_03.gif";
hillcrest_04_off.src = "../images/navigation_04.gif";
hillcrest_05_off.src = "../images/navigation_05.gif";
hillcrest_06_off.src = "../images/navigation_06.gif";
hillcrest_07_off.src = "../images/navigation_07.gif";
hillcrest_08_off.src = "../images/navigation_08.gif";

function swapImg(N, S) {document.images[N].src = eval(S+".src");}