function isEmpty(strsubscriber_name) {
  strsubscriber_name = document.forms[0].subscriber_name.value   
    if (strsubscriber_name == "" || strsubscriber_name == null || !isNaN(strsubscriber_name) || strsubscriber_name.charAt(0) == ' ')    {
    alert("Please enter your First Name.")
	document.theform.subscriber_name.focus();
    return false;
  }
  return true;
}

function isValidsubscriber_email(strsubscriber_email){
	validRegExp = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.([a-z]){2,4})$/;
  //validRegExp = /\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.info)|(\..{2,2}))$)\b/gi;
  //validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
  strsubscriber_email = document.forms[0].subscriber_email.value;
  
    if (strsubscriber_email.search(validRegExp) == -1)    {
    alert('Please enter a valid Email');
    document.theform.subscriber_email.focus();
    return false;
  }
  return true;
}

function check(form){
  if (isEmpty(form.subscriber_name)){
    if (isValidsubscriber_email(form.subscriber_email)){
      return true;
    }
  }
  return false;
}