function popupMessage(message){
	//create div
	var div= document.createElement("div");
	var p= document.createElement("p");
	var a= document.createElement("a");
	p.innerHTML= message;
	a.innerHTML= "chiudi";
	div.appendChild(p);
	a= div.appendChild(a);
	a.href="#";
	div= document.getElementsByTagName("body")[0].appendChild(div);
	
	var divHeight= div.offsetHeight;
	/*TODO*/
	div.style.marginTop= "-"+((divHeight+44)/2)+"px";
	div.style.display= "block";
	div.id= "popup_message";
	
	crossBrowserEventListener(a, "click", 
			function(div){
				return function(){ 
					preventDefaultAction(arguments[0] || event);
					div.parentNode.removeChild(div);
				}
			}(div)
	);
	
	
}