function newsletter(){
	
    advAJAX.post({
	    url: "php/newsletter.php",
	    parameters : {
	      "mail" : document.getElementById('mail').value
	    },
	    onLoading : function(obj){ 
			document.getElementById("formularz").innerHTML='<br/><img style="float:left;margin-left:25px;margin-top:-20px;" src="pliki/ajax-loader.gif"/><br/><br/>';
	    },
	    onComplete : function(obj) { 
	    },
	    onSuccess : function(obj) { 
			document.getElementById('formularz').innerHTML = obj.responseText;
	    },
	    onError : function(obj) {
	   }
	});
}