var step = 2;
var flyDelay = 14;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var flyInterval;
var flyTimeout;

var startPos = 0;
var sleft, stop;
var xPos = 20;
var yPos;
var flyObj;
var flyFlying = false;
var flyPaused = false;

var swapImg = null;
var flyImg = null;

if (typeof(fly['CookieName']) == 'undefined') {
	fly['CookieName'] = 'FLY';
} else {
	fly['CookieName'] = 'FLY'+ fly['CookieName'];
}

if (typeof(fly['Times']) == 'undefined') {
	fly['Times'] = 2;
}

if (typeof(fly['ExpiresIn']) == 'undefined') {
	fly['ExpiresIn'] = 24 * 60; // in minutes
}

// Used when one image is for going to the left side and other for going back

if (fly['Name_back']) {
	swapImg = new Image();
	// FIXME: should rather use image url here, because we don't alter click
	// target and this way banner statistics go weird

	swapImg.src = 'http://www.vara.ee/cgi-bin/click.cgi?action=jump&URL=http://www.vararate.com'
}

function flyGetObj(id) {
	if (document.getElementById) {
		return document.getElementById(id);
	}

	if (document.all) {
		return document.all[id];
	}

	if (document.layers) {
		return document.layers[id];
	}

	return null;
}

function flyGetDim() {
	if ((window.innerWidth && (typeof(document.body) == 'undefined')) ||
			(document.body.clientHeight > window.innerHeight) ||
			(document.innerWidth < document.body.clientWidth)) {
		pwidth = window.innerWidth;
		pheight = window.innerHeight;

		sleft = window.pageXOffset;
		stop = window.pageYOffset;

	} else {
		pwidth = document.body.clientWidth;
		pheight = document.body.clientHeight;

		sleft = document.body.scrollLeft;
		stop = document.body.scrollTop;
	}

	stop -= 2;
	yPos = pheight;
}

function flyChangePos() {
	if (yPos >= (pheight - Hoffset)) {
		yon = 0;
		yPos = (pheight - Hoffset);
	}

	if (flyObj.style) {
		flyObj.style.left = xPos + sleft;
		flyObj.style.top = yPos + stop;

	} else {
		flyObj.pageY = yPos + stop;
		flyObj.pageX = xPos + sleft;

	}

	if (xon) {
		xPos = xPos + step;

	} else {
		xPos = xPos - step;
	}

	if (xPos < 0) {
		xon = 1;
		xPos = 0;

		// reached left border
		if (swapImg) {
			flySwapImg();
		}
	}

	if (xPos >= (pwidth - startPos - Woffset)) {
		xon = 0;
		xPos = (pwidth - startPos - Woffset);

		// reached right border
		if (swapImg) {
			flySwapImg();
		}
	}
	flyGetDim();
}

// luckily swapping images like this it will not make another request to webserver
function flySwapImg() {
	var img = new Image();

	if (!flyImg) {
		flyImg = flyGetObj('fly_img');
		// this fails for ns4
		if (!flyImg) {
			return;
		}
	}

	img.src = flyImg.src;
	flyImg.src = swapImg.src;
	swapImg.src = img.src;

}

function flyEndFloat() {
	if (flyObj.style) {
		flyObj.style.visibility = 'hidden';
		flyObj.style.display = 'none';
	} else {
		flyObj.visibility = 'hidden';
	}
	clearInterval(flyInterval);
}

function flyPrepare() {
	flyInterval = setInterval('flyChangePos()', flyDelay);
	flyTimeout = setTimeout('flyEndFloat()', fly['Timeout'] * 2000);
	flyPaused = false;
}

function flyLaunch() {
	flyObj = flyGetObj('flyThing');

	if (flyObj) {
		flyGetDim();

		Hoffset = (flyObj.offsetHeight ? flyObj.offsetHeight : flyObj.clip.height);
		Woffset = (flyObj.offsetWidth ? flyObj.offsetWidth : flyObj.clip.width);
		if (pwidth > 770) {
			startPos = (pwidth - 770) / 2;
		}

		if (flyObj.style) {
			flyObj.style.visibility = 'visible';
		} else {
			flyObj.visibility = 'visible';
		}

		flyFlying = true;
		flyPrepare();
	}
}

function flyMouseOver() {
	if (flyFlying) {
		clearInterval(flyInterval);
		clearTimeout(flyTimeout);
		flyPaused = true;
	}
}

function flyMouseOut() {
	if (flyFlying && flyPaused) {
		flyPrepare();
	}
}

function FLYcheckRef() {
	newDomain = dhtmlTheDomain.replace(/\./gi, '\\.');
	re = new RegExp("^http:\/\/\\w+\."+ newDomain, "i");
	if (re.test(document.referrer)) {
		return true;
	} else {
		return false;
	}
}

function flySetup() {
	var cookie = dhtmlGetCook(fly['CookieName']);
	var overTimes = 0;

	if (fly['Times'] != DHTML_IGNORE_COOKIES) {
		if (cookie == DHTML_NO_COOKIES) {
			overTimes = 1;

		} else {
			if (cookie != false) {
				var count = dhtmlGetCount(cookie);
				var FLYs = dhtmlGetCook(fly['CookieName'] + 's');

				if ((count >= fly['Times']) || (FLYs == '1') || FLYcheckRef()) {
					overTimes = 1;

				} else {
					dhtmlSetCook(fly['CookieName'], ++count, fly['ExpiresIn']);
				}
			} else {
				dhtmlSetCook(fly['CookieName'], 1, fly['ExpiresIn']);
			}
		}
	}

	if (!overTimes && typeof(dhtmlPush) != 'undefined') {
		dhtmlPush('flyLaunch');
	}
}




flySetup();