this.swf_url = "";
this.swf_id = "Flash";
this.layer_name = "";
this.xx = 0;//window
this.yy = 0;//window
this.width = 1;
this.height = 1;
this.zIndex = 0;
this.body = document['CSS1Compat' == document.compatMode ? 'documentElement' : 'body'];
this._oLayer = "";

this.flashvars_labels = [];
this.flashvars_values = [];

this._ww_full_flg = "false";
this._hh_full_flg = "false";
}

//----------------------------
// SWF
//----------------------------
SWFLayer.prototype._createFlashVarsValue = function(){
var value = "browser=" + this._checkBrowser() + "&";
var flashvars_labels = this.flashvars_labels;
var flashvars_values = this.flashvars_values;
for(var i=0; i < flashvars_labels.length; i++){
value += flashvars_labels[i] + "=" + flashvars_values[i] + "&";
}
value = value.substring(0,value.length - 1);
return value;
};

SWFLayer.prototype.create = function(){
var swf_url = this.swf_url;
var swf_id = this.swf_id;
var layer_name = this.layer_name;

var html = "";
html += "<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0' width='100%' height='100%' id='"+swf_id+"' align='middle'>";
html += "<param name='allowScriptAccess' value='always' />";

if(this.flashvars_labels.length > 0){
html += "<param name='flashvars' value='" + this._createFlashVarsValue() + "'>";
}

html += "<param name='movie' value='" + swf_url + "' /><param name='scale' value='noscale' /><param name='salign' value='lt' /><param name='quality' value='high' /><param name='wmode' value='transparent' /><embed src='" + swf_url + "' quality='high' scale='noscale' salign='lt' wmode='transparent' width='100%' height='100%' name='"+swf_id+"' id='"+swf_id+"' swLiveConnect=true align='middle' allowScriptAccess='always' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer'";
if(this.flashvars_labels.length > 0){
html += " flashvars='" + this._createFlashVarsValue() + "'";
}
html += "/>";
html += "</object>";

var oLayer = document.createElement('div');
oLayer.setAttribute('id',layer_name);
//oLayer.style.background = "#FF0000";
oLayer.innerHTML = html;
oLayer.style.position = 'absolute';
oLayer.style.zIndex = this.zIndex;
document.body.appendChild(oLayer);
this._oLayer = oLayer;

};

//
//
//----------------------------
SWFLayer.prototype._checkBrowser = function(){
var uName = navigator.userAgent;
if (uName.indexOf("Safari") > -1) return "Safari";
if (uName.indexOf("MSIE") > -1){
return "MSIE";
}
return "Netscape";
};

//---------------------------------------------------------------
//
//---------------------------------------------------------------
SWFLayer.prototype.setSize = function(ww,hh){
var browser = this._checkBrowser();
//
if(ww == 'full'){
this._ww_full_flg = "true";
if(browser == "MSIE"){
this.width = this.body.clientWidth;
}else if(browser == "Netscape"){
this.width = window.innerWidth - 17;
}else{
this.width = window.innerWidth;
}
}else{
this._ww_full_flg = "false";
this.width = ww;
}

//??
if(hh == 'full'){
this._hh_full_flg = "true";
if(browser == "MSIE"){
this.height = this.body.clientHeight;
}else if(browser == "Netscape"){
this.height = window.innerHeight-17;
}else{
this.height = window.innerHeight;
}
}else{
this._hh_full_flg = "false";
this.height = hh;
}
this._oLayer.style.width = this.width + 'px';
this._oLayer.style.height = this.height + 'px';
};

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------
SWFLayer.prototype.setPos = function(xx,yy){
var browser = this._checkBrowser();

this.xx = xx;
this.yy = yy;

//X??
if(browser == "MSIE"){
this._oLayer.style.left = this.xx + this.body.scrollLeft + 'px';
this._oLayer.style.top = this.yy + this.body.scrollTop + 'px';
}else {
this._oLayer.style.left = this.xx + pageXOffset + 'px';
this._oLayer.style.top = this.yy + pageYOffset + 'px';
}

};

//
//
//--------------------------------------------------------------------
SWFLayer.prototype.setPosFixed = function(xx,yy){

this.xx = xx;
this.yy = yy;

//X??
this._oLayer.style.left = this.xx + 'px';
this._oLayer.style.top = this.yy + 'px';

};

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------

SWFLayer.prototype.setdPos = function(d_xx,d_yy){

this.xx += d_xx;
this.yy += d_yy;

this.setPos(this.xx,this.yy);
};

//--------------------------------------------------------------------
// str='left' or 'right'
//--------------------------------------------------------------------
SWFLayer.prototype.setWindowAlign = function(str){
var browser = this._checkBrowser() ;
if(str == 'right'){
if(browser == "MSIE"){
this.xx = this.body.clientWidth - this.width;
}else {
this.xx = window.innerWidth - this.width;
//Mozilla
if(browser == "Netscape"){
this.xx -= 17;
}
}
}else{
if(browser == "MSIE"){
this.xx = 0;
}else {
this.xx = 0;
}
}

this.setPos(this.xx,this.yy);
};

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------
SWFLayer.prototype.setWindowAlignFixed = function(str){
//alert("aaa");
var browser = this._checkBrowser() ;
if(str == 'right'){
if(browser == "MSIE"){
this.xx = this.body.clientWidth - this.width + this.body.scrollLeft;
}else {
this.xx = window.innerWidth - this.width + pageXOffset;
//Mozilla
if(browser == "Netscape"){
this.xx -= 17;
}
}
}else{
if(browser == "MSIE"){
this.xx = 0;
}else {
this.xx = 0;
}
}

this.setPosFixed(this.xx,this.yy);
};

//--------------------------------------------------------------------
//str='top' or 'bottom'
//--------------------------------------------------------------------
SWFLayer.prototype.setWindowValign = function(str){
//
var browser = this._checkBrowser();
if(str == 'bottom'){
if(browser == "MSIE"){
this.yy = this.body.clientHeight - this.height;
}else {
this.yy = window.innerHeight - this.height;
//Mozilla
if(browser == "Netscape"){
this.yy -= 17;
}
}
}else{
if(browser == "MSIE"){
this.yy = 0;
}else {
this.yy = 0;
}
}
this.setPos(this.xx,this.yy);
};

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------
SWFLayer.prototype.setWindowValignFixed = function(str){
//
var browser = this._checkBrowser();
if(str == 'bottom'){
if(browser == "MSIE"){
//alert(this.body.scrollHeight);
this.yy = this.body.scrollHeight - this.height;
}else {
this.yy = this.body.offsetHeight - this.height;
//this.yy = window.innerHeight - this.height;
//Mozilla
if(browser == "Netscape"){
this.yy -= 17;
}
}
}else{
if(browser == "MSIE"){
this.yy = 0;
}else {
this.yy = 0;
}
}
this.setPosFixed(this.xx,this.yy);
};

//--------------------------------------------------------------------
//(str = 'visible' or 'hidden')
//--------------------------------------------------------------------
SWFLayer.prototype.setVisible = function(str){
this._oLayer.style.visibility = str;
};

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------
SWFLayer.prototype.correctWindowSize = function(str){
if(this._ww_full_flg == "true" && this._hh_full_flg == "true"){
this.setSize("full","full");
}
else if(this._ww_full_flg == "true"){
//alert("_ww_full_flg = true");
this.setSize("full",this.height);
}
else if(this._hh_full_flg == "true"){
//alert("_hh_full_flg = true");
this.setSize(this.width,"full");
}
};

//---------------------------------------------------------------------
//
//---------------------------------------------------------------------
function eventObserve(obj,e, func, bool){
if (obj.addEventListener){
obj.addEventListener(e, func, bool)
}else if (obj.attachEvent){
obj.attachEvent("on" + e, func)
}
}

var noel_deco = "";
var noel_deco_flashvars_labels = ["myUrl"];
var noel_deco_flashvars_values = [location.host];//location.hostname
var noel_deco_zIndex = 1;

//--------------------------------------------------------------------
//load
//--------------------------------------------------------------------
function loadnoeldeco(data){
noel_deco = new SWFLayer();
noel_deco.zIndex = noel_deco_zIndex;
noel_deco.swf_url = "http://sd-1.archive-host.com/membres/up/28346071248525984/sapingauche.swf";
noel_deco.swf_id = "noel_deco_swf";
noel_deco.layer_name = "noel_deco";

noel_deco.flashvars_labels = noel_deco_flashvars_labels;
noel_deco.flashvars_values = noel_deco_flashvars_values;

noel_deco.create();
noel_deco.setSize(170,200);//win
noel_deco.setWindowAlignFixed('left');
noel_deco.setWindowValignFixed('top');
if(checkBrowser() == "Safari"){
window.resizeBy(1,0);
}
}

eventObserve(window, 'load', loadnoeldeco, false);

//--------------------------------------------------------------------
//scroll
//--------------------------------------------------------------------
function scrollnoeldeco(){
noel_deco.setWindowAlignFixed('left');

}
//
eventObserve(window, 'scroll', scrollnoeldeco, false);

//--------------------------------------------------------------------
//resize
//--------------------------------------------------------------------
function resizenoeldeco(){
noel_deco.setWindowAlignFixed('left');

}
//window.resize
eventObserve(window, 'resize', resizenoeldeco, false);

//--------------------------------------------------------------------
//
//--------------------------------------------------------------------
//
document.getElementsByTagName("html")[0].style.overflow="scroll";

function hidenoel_deco(){
noel_deco.setVisible("hidden");
}

function setClose(){
noel_deco.setSize(0,0);
}

function checkBrowser(){
var uName = navigator.userAgent;
if (uName.indexOf("Safari") > -1) return "Safari";
if (uName.indexOf("MSIE") > -1){
return "MSIE";
}
return "Netscape";
};[/spoiler]
Называете скрипт, допустим, elka.js, заливаете себе на сайт, например, в папку script, между <head> и </head> вставляете это:
<script type="text/javascript" src="http://ваш_сайт.ru/script/elka.js"></script>
Пример можете посмотреть на сайте в подписи.