function isEmailOk(data) {
  if (data.indexOf(".") != -1) {
	  if (data.indexOf("@") != -1)  { 
		  return true;
		  }
		}
	else return false;	  
}

function isSpace(data) {
	var contr2=0;
	for(var i=0; i < data.length; i++){
		if(data.substring(i, i+1) != " "){
			contr2=1;
		}   
		if  (contr2==1)   
			return(false);  
	}
	return(true);
}

function checkRequiredFields() {
	
	var message = new Array();
	var errorLevel;
	
	message[0]  = "";
	
	
			message[1] = "Il campo email è obbligatorio !";
			message[2] = "Indirizzo email non corretto !";
								
				 
	errorLevel = 0;  
	
	if ((errorLevel == 0) && ((document.FormN.mynews_email.value.length == 0) || isSpace(document.FormN.mynews_email.value))) errorLevel = 1;	
	if ((errorLevel == 0) && (!(isEmailOk(document.FormN.mynews_email.value)))) errorLevel = 2;
	
	if (errorLevel > 0 ) { 
		alert(message[errorLevel]); 
		return false;
	} 
	return true;
}