// JavaScript Document
//vedi che c'è questo che è importantissimo:
//ereg( "^[^@  ]+@([a-zA-Z0-9\-]+\.)+([a-zA-Z0-9\-]{2}|net|biz|info|com|gov|mil|org|edu|int)\$",$address
									   
function checkMail(idField){
	//idField è l'id del campo email
	var email=document.getElementById(idField).value;
	if (email=='' || email.indexOf('@')<5 || email.length<10){
			alert('Devi inserire un indirizzo Email valido!');
			document.getElementById(idField).focus();
			return false;
		}//if
		var comodo=email.split('@');
		if (comodo[1]<5){
			alert('Devi inserire un indirizzo Email valido!');
			document.getElementById(idField).focus();
			return false;
		}//if
		var estensione=comodo[1].split('.');
		var tail=estensione[estensione.length-1];
		if (!isNaN(estensione[0])){
			alert('Devi inserire un indirizzo Email valido!');
			document.getElementById(idField).focus();
			return false;
		}//if
		tail=tail.toUpperCase();
		if (tail!='COM' && tail!='NET' && tail!='ORG' && tail!='EDU'&& tail!='GOV' && tail!='INFO' 
		  && tail!='AD' && tail!='AE' && tail!='AF' && tail!='AG' && tail!='AI' && tail!='AL' && tail!='AM' && tail!='AN' && tail!='AO' && tail!='AQ' && tail!='AR' && tail!='AS' && tail!='AT' && tail!='AU' && tail!='AW' && tail!='AZ' && tail!='BA' && tail!='BB' && tail!='BD' && tail!='BE' && tail!='BF' && tail!='BG' && tail!='BH' && tail!='BI' && tail!='BJ' && tail!='BM' && tail!='BN' && tail!='BO' && tail!='BR' && tail!='BS' && tail!='BT' && tail!='BV' && tail!='BW' && tail!='BY' && tail!='BZ' && tail!='CA' && tail!='CC' && tail!='CF' && tail!='CG' && tail!='CH' && tail!='CI' && tail!='CK' && tail!='CL' && tail!='CM' && tail!='CN' && tail!='CO' && tail!='CR' && tail!='CS' && tail!='CU' && tail!='CV' && tail!='CX' && tail!='CY' && tail!='CZ' && tail!='DE' && tail!='DJ' && tail!='DK' && tail!='DM' && tail!='DO' && tail!='DZ' && tail!='EC' && tail!='EE' && tail!='EG' && tail!='EH' && tail!='ES' && tail!='ET' && tail!='FI' && tail!='FJ' && tail!='FK' && tail!='FM' && tail!='FO' && tail!='FR' && tail!='FX' && tail!='GA' && tail!='GB' && tail!='GD' && tail!='GE' && tail!='GH' && tail!='GI' && tail!='GL' && tail!='GP' && tail!='GQ' && tail!='GF' && tail!='GM' && tail!='GN' && tail!='GR' && tail!='GT' && tail!='GU' && tail!='GW' && tail!='GY' && tail!='HK' && tail!='HM' && tail!='HN' && tail!='HR' && tail!='HT' && tail!='HU' && tail!='ID' && tail!='IE' && tail!='IL' && tail!='IN' && tail!='IO' && tail!='IQ' && tail!='IR' && tail!='IS' && tail!='IT' && tail!='JM' && tail!='JO' && tail!='JP' && tail!='KE' && tail!='KG' && tail!='KH' && tail!='KI' && tail!='KM' && tail!='KN' && tail!='KP' && tail!='KR' && tail!='KY' && tail!='KZ' && tail!='LA' && tail!='LB' && tail!='LC' && tail!='LI' && tail!='LK' && tail!='LR' && tail!='LS' && tail!='LT' && tail!='LU' && tail!='LV' && tail!='LY' && tail!='MA' && tail!='MC' && tail!='MD' && tail!='MG' && tail!='MH' && tail!='ML' && tail!='MM' && tail!='MN' && tail!='MO' && tail!='MP' && tail!='MQ' && tail!='MR' && tail!='MS' && tail!='MT' && tail!='MU' && tail!='MV' && tail!='MW' && tail!='MX' && tail!='MY' && tail!='MZ' && tail!='NA' && tail!='NC' && tail!='NE' && tail!='NF' && tail!='NG' && tail!='NI' && tail!='NL' && tail!='NO' && tail!='NP' && tail!='NR' && tail!='NT' && tail!='NU' && tail!='NZ' && tail!='OM' && tail!='PA' && tail!='PE' && tail!='PF' && tail!='PG' && tail!='PH' && tail!='PK' && tail!='PL' && tail!='PM' && tail!='PN' && tail!='PT' && tail!='PR' && tail!='PW' && tail!='PY' && tail!='QA' && tail!='RE' && tail!='RO' && tail!='RU' && tail!='RW' && tail!='SA' && tail!='SB' && tail!='SC' && tail!='SD' && tail!='SE' && tail!='SG' && tail!='SH' && tail!='SI' && tail!='SJ' && tail!='SK' && tail!='SL' && tail!='SM' && tail!='SN' && tail!='SO' && tail!='SR' && tail!='ST' && tail!='SU' && tail!='SV' && tail!='SY' && tail!='SZ' && tail!='TC' && tail!='TD' && tail!='TF' && tail!='TG' && tail!='TH' && tail!='TJ' && tail!='TK' && tail!='TM' && tail!='TN' && tail!='TO' && tail!='TP' && tail!='TR' && tail!='TT' && tail!='TV' && tail!='TW' && tail!='TZ' && tail!='UA' && tail!='UG' && tail!='UK' && tail!='UM' && tail!='US' && tail!='UY' && tail!='UZ' && tail!='VA' && tail!='VC' && tail!='VE' && tail!='VG' && tail!='VI' && tail!='VN' && tail!='VU' && tail!='WF' && tail!='WS' && tail!='YE' && tail!='YU' && tail!='ZA' && tail!='ZM' && tail!='ZR' && tail!='ZW' ){
			alert('Devi inserire un indirizzo Email valido!');
			document.getElementById(idField).focus();
			return false;
		}//if
		return true;
	}//checkMail