<!--
/**
 * BannerScript.js
 * @author Ryan Heath
 * www.nofus.co.uk
 *
 * Used only with permission.
 */

// Hide first screen here so if javascript doesnt work, the page still looks good
document.write("<style type='text/css'>#quote1 { visibility:hidden; }</style>");

var num_banners = 12;
var banner_showing = 1;
var banner_cycling = true;
var banner_cycle_stop = false;
var banner_cycle_timeout = 10; // in seconds
var banner_intervalID;
var transitioning = false;

function start_banner_cycling() {
  showBanner(1);
  banner_intervalID = window.setInterval("rotate_banner()", banner_cycle_timeout*1000);
}

function rotate_banner() {
  // If cycling has been stopped, clear interval 
  if (banner_cycle_stop==true && banner_cycling==true) {
    window.clearInterval(banner_intervalID);
    banner_cycling = false;
  } else {
	var randomnumber=Math.floor(Math.random()*num_banners)+1;
	banner_transition(randomnumber);
  } // END IF
} 

function showBanner(bannerstart) {
	// Get the quote
	js_image = document.getElementById('quote'+bannerstart);
	// Fade the quote in
	window.setTimeout("fadeIn('quote"+bannerstart+"',0)", 100);
} // end showBanner


function fadeIn(objId,opacity) {
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity <= 100) {
      obj.style.visibility = "visible";
			setOpacity(obj, opacity);
			opacity += 10;
			window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
		} else {
      transitioning = false;
		}
	}
}
function fadeOut(objId,opacity) {
  // Set transitioning flag
  transitioning = true;  
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity >= 0) {
			setOpacity(obj, opacity);
			opacity -= 10;
			window.setTimeout("fadeOut('"+objId+"',"+opacity+")", 100);
		} else
      obj.style.visibility = "hidden";
	}
}

function setOpacity(obj, opacity) {
	// IE/Win
	obj.style.filter = "alpha(opacity:"+opacity+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
}

function banner_transition(transition_to) {
  // If a different banner has been requested
  if (transition_to != banner_showing && !transitioning) { 
    // Fade out old quote
    fadeOut('quote'+banner_showing, 100);
    // Fade in new quote
    fadeIn('quote'+transition_to, 0);
    // Record that banner changed
    banner_showing = transition_to;
  }
}

function fadeTransition(img1, img2, opacity) {
	if (document.getElementById) {
		image1 = document.getElementById(img1);
		image2 = document.getElementById(img2);
		image2.style.visibility = "visible";
		
		if (opacity <= 100) {
			setOpacity(image2, opacity);
			setOpacity(image1, 100-opacity);
			opacity += 10;
			window.setTimeout("fadeTransition('"+img1+"', '"+img2+"',"+opacity+")", 100);
		}
	}	
}
// -->
