<!--

function checkmail(checkThisEmail)
{
var myEMailIsValid = true;
var myAtSymbolAt = checkThisEmail.indexOf('@');
var myLastDotAt = checkThisEmail.lastIndexOf('.');
var mySpaceAt = checkThisEmail.indexOf(' ');
var myLength = checkThisEmail.length;


// at least one @ must be present and not before position 2
// @yellow.com : NOT valid
// x@yellow.com : VALID

if (myAtSymbolAt < 1 )
 {myEMailIsValid = false}


// at least one . (dot) afer the @ is required
// x@yellow : NOT valid
// x.y@yellow : NOT valid
// x@yellow.org : VALID

if (myLastDotAt < myAtSymbolAt)
 {myEMailIsValid = false}

// at least two characters [com, uk, fr, ...] must occur after the last . (dot)
// x.y@yellow. : NOT valid
// x.y@yellow.a : NOT valid
// x.y@yellow.ca : VALID

if (myLength - myLastDotAt <= 2)
 {myEMailIsValid = false}


// no empty space " " is permitted (one may trim the email)
// x.y@yell ow.com : NOT valid

if (mySpaceAt != -1)
 {myEMailIsValid = false}




return myEMailIsValid
}



function check()
{
ok=0;
for (i=0;i<document.questionario.dom9.length;i++)
	if	(document.questionario.dom9[i].checked==true)
		ok=ok+1;
for (i=0;i<document.questionario.dom10.length;i++)
	if	(document.questionario.dom10[i].checked==true)
		ok=ok+1;
if (ok==2)
	{
		if (checkmail(document.questionario.email.value))
			document.questionario.submit();
		else
			alert("Email non corretta!")
	}
 else
 	alert ("Devi rispondere a tutte le domande ! ");
}
-->