function validmail(email)
{
invalidChars = " /:,;"

if(email == "")
{
return false
}
for(i=0; i < invalidChars.length; i++)
{
badChar = invalidChars.charAt(i)
if(email.indexOf(badChar,0) > -1)
{
return false
}
}
atPos = email.indexOf("@",1)
if (atPos == -1)
{
return false
}
if(email.indexOf("@",atPos+1) > -1)
{
return false
}
periodPos = email.indexOf(".",atPos)
if(periodPos == -1)
{
return false
}
if(periodPos+3 > email.length)
{
return false
}
return true
}

function submitIt(carForm)
{
if(!validmail(document.myForm.email.value))
{
document.myForm.email.focus();
alert("E-mail inválido");
return false
}
return true
}