if (document.images) {
home_on = new Image();
home_on.src = "buttons/home_on.gif";
home_off = new Image();
home_off.src = "images/home_off.gif";
contacts_on = new Image();
contacts_on.src = "buttons/contacts_on.gif";
contacts_off = new Image();
contacts_off.src = "buttons/contacts_off.gif";
press_on = new Image();
press_on.src = "buttons/press_on.gif";
press_off = new Image();
press_off.src = "buttons/press_off.gif";
pubblicazioni_on = new Image();
pubblicazioni_on.src = "buttons/pubblicazioni_on.gif";
pubblicazioni_off = new Image();
pubblicazioni_off.src = "buttons/pubblicazioni_off.gif";
presentation_on = new Image();
presentation_on.src = "buttons/presentation_on.gif";
presentation_off = new Image();
presentation_off.src = "buttons/presentation_off.gif";
eventi_on = new Image();
eventi_on.src = "buttons/eventi_on.gif";
eventi_off = new Image();
eventi_off.src = "buttons/eventi_off.gif";
video_on = new Image();
video_on.src = "buttons/video_on.gif";
video_off = new Image();
video_off.src = "buttons/video_off.gif";
}
function changeImage(imgNam, newImg) {
	if (document.images)
		document[imgNam].src = newImg;
}
function rollOver(name, status) {
    changeImage(name, eval(name + '_' + status + '.src'));
}


function targetBlank (url) {
  blankWin = window.open(url,'_blank','menubar=yes,toolbar=yes,location=yes,directories=yes,fullscreen=no,titlebar=yes,hotkeys=yes,status=yes,scrollbars=yes,resizable=yes');
}