function checkEmail_cb(index){
	document.getElementById("riquadro_sopra").innerHTML=index;
	document.getElementById("send").disabled=false;
}

function checkEmail(){
 var email;
 var reg = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
 email=	document.getElementById("email").value;
    
 
   if(reg.test(email))	{
   	   
	    x_checkEmail(email,checkEmail_cb);
    }else{
		document.getElementById("riquadro_sopra").innerHTML="<span style='color:#990000; font-weight: bold;'>L'indirizzo di posta elettronica non &eacute; valido</font>";
		document.getElementById("send").disabled=true;	
	}

}

/**************Add and Delete fields functions*******************/

function addField(){
	
}