//  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/but_home_1.gif";
		imag[1]="images/but_about_1.gif";
		imag[2]="images/but_sol_1.gif";
		imag[3]="images/but_serv_1.gif";
		imag[4]="images/but_sup_1.gif";
		imag[5]="images/but_clients_1.gif";
		imag[6]="images/but_con_1.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/but_" + s + "_1.gif";
		}
	}

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