// Fly-in Advert Script
// copyright Stephen Chapman, 14th June 2005
// you may copy this code but please keep the copyright notice as well
var speed = 6;

var aDOM = 0, ieDOM = 0, nsDOM = 0; 
var stdDOM = document.getElementById;

if (stdDOM) aDOM = 1; 
	else {ieDOM = document.all; 

if (ieDOM) aDOM = 1; 
	else {
		var nsDOM = ((navigator.appName.indexOf('Netscape') != -1)
		&& (parseInt(navigator.appVersion) ==4)); if (nsDOM) aDOM = 1;}}
		
		function xDOM(objectId, wS) {
			if (stdDOM) return wS ? document.getElementById(objectId).style:document.getElementById(objectId);
			if (ieDOM) return wS ? document.all[objectId].style: document.all[objectId];
			if (nsDOM) return document.layers[objectId];
		}
		
function objWidth(objectID) {
	var obj = xDOM(objectID,0); 
	if(obj.offsetWidth) 
		return obj.offsetWidth; 
	if (obj.clip) 
		return obj.clip.width; 
		return 0;
	}
	
function objHeight(objectID){
	var obj = xDOM(objectID,0); 
	if(obj.offsetHeight) 
		return obj.offsetHeight; 
	if (obj.clip) 
		return obj.clip.height; 
		return 0;
	}
	
function setObjVis(objectID,vis) {
		var objs = xDOM(objectID,1); 
		objs.visibility = vis;
	}
	
	
function moveObjTo(objectID,x,y) {
		var objs = xDOM(objectID,1); 
		objs.left = x; 
		objs.top = y;
	}
	
	
function pageWidth() {
		return window.innerWidth != null? window.innerWidth:document.body != null? document.body.clientWidth:null;
		}
		
		
function pageHeight() {
		return window.innerHeight != null? window.innerHeight:document.body != null? document.body.clientHeight:null;
		}
		
		
function posLeft() {
		return typeof window.pageXOffset != 'undefined' ? window.pageXOffset:document.documentElement.scrollLeft? document.documentElement.scrollLeft:document.body.scrollLeft? document.body.scrollLeft:0;
		}
		
		
function posTop() {
		return typeof window.pageYOffset != 'undefined' ? window.pageYOffset:document.documentElement.scrollTop? document.documentElement.scrollTop: document.body.scrollTop?document.body.scrollTop:0;
		}
		
var xxx = 0; 
var yyy = 0; 
var dist = distX = distY = 0; 
var stepx = 2; 
var stepy = 2; 
var ad = 'flyad';

function distance(s,e) {
	return Math.abs(s-e)
	}
	
function direction(s,e) {
	return s>e?-1:1
	}
	
function rate(a,b) {
	return a<b?a/b:1
	}
	
function start() {
	xxx = -objWidth(ad)-10; 
	yyy = 1; 
	var eX = (pageWidth()-objWidth(ad))/2; 
	var eY = (pageHeight()-objHeight(ad))/2; 
	dist = distX = distance(xxx,eX); 
	distY = distance(yyy,eY); 
	stepx *= direction(xxx,eX) * rate(distX,distY); 
	stepy *= direction(yyy,eY) * rate(distY,distX); moveit();
	setObjVis(ad,'visible'); mover();
	}
	
function moveit() {
	var x = (posLeft()+xxx) + 'px'; 
	var y = (posTop()+yyy) + 'px'; 
	moveObjTo(ad,x,y);
	}
	
function mover() {
	if (dist > 0) {
		xxx += stepx; yyy += stepy; 
		dist -= Math.abs(stepx);
	} 
	
	moveit(); setTimeout('mover()',speed);
	}
	
function moveback() {
	dist = distX; 
	stepx = -stepx; 
	moveit(); 
	setTimeout('mover()',speed/2);
	}
	
window.onload = start;
window.onscroll = moveit;