//  Browser check
	if (navigator.appName.indexOf('Microsoft') >= 0 && navigator.appVersion.indexOf('3.') >=0) {
		okbrowser = false;
		}
	else {
		okbrowser = true;
		}
	//  Load images
	imag = new Array();
			imag[0]="images/nav_who_0.gif"
			imag[1]="images/nav_cap_0.gif"
			imag[2]="images/nav_contact_0.gif"

	im = new Array()
	if(document.images) {
		for (var i = 0; i < imag.length; i++) {
			im[i] = new Image();
			im[i].src = imag[i];
			}
		}
//  Mouseover functions
function on(s) {
	if (okbrowser) {
		document.images[s].src= "images/" + s + "_1.gif";
		}
	}

function off(s, filetype) {
	if (okbrowser) {
		document.images[s].src= "images/" + s + "_0.gif";
		}
	}
	
function onAlt(s, filename, filetype) {
	if (okbrowser) {
		document.images[s].src= "images/" + filename + "." + filetype;
		}
	}