function NewWindow(mypage, myname, w, h, scroll, resize) {
      var winl = (screen.width - w) / 2;
      var wint = (screen.height - h) / 2;
     winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable='+resize+',toolbar=no,location=no,status=no,menubar=no,dependent=no'
        win = window.open(mypage, myname, winprops)
     if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
        }

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}
function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_nav_es_home_click = newImage('images/nav_es_home_click.gif');
		pre_nav_es_about_over = newImage('images/nav_es_about_over.gif');
		pre_nav_es_about_click = newImage('images/nav_es_about_click.gif');
		pre_nav_es_home_over = newImage('images/nav_es_home_over.gif');
		pre_nav_es_comm_over = newImage('images/nav_es_comm_over.gif');
		pre_nav_es_comm_click = newImage('images/nav_es_comm_click.gif');
		pre_nav_es_faq_over = newImage('images/nav_es_faq_over.gif');
		pre_nav_es_faq_click = newImage('images/nav_es_faq_click.gif');
		pre_nav_es_news_over = newImage('images/nav_es_news_over.gif');
		pre_nav_es_news_click = newImage('images/nav_es_news_click.gif');
		pre_nav_es_links_over = newImage('images/nav_es_links_over.gif');
		pre_nav_es_links_click = newImage('images/nav_es_links_click.gif');
		pre_nav_es_rates_over = newImage('images/nav_es_rates_over.gif');
		pre_nav_es_rates_click = newImage('images/nav_es_rates_click.gif');
		pre_nav_es_contact_over = newImage('images/nav_es_contact_over.gif');
		pre_nav_es_contact_click = newImage('images/nav_es_contact_click.gif');
		pre_nav_es_english_over = newImage('images/nav_es_english_over.gif');
		pre_nav_es_english_click = newImage('images/nav_es_english_click.gif');
		pre_nav_es_tour_over = newImage('images/nav_es_tour_over.gif');
		pre_nav_es_tour_click = newImage('images/nav_es_tour_click.gif');
		pre_nav_es_view_over = newImage('images/nav_es_view_over.gif');
		pre_nav_es_view_click = newImage('images/nav_es_view_click.gif');
		preloadFlag = true;
	}
}