// Form Validator
function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
  result = true;
  }

  return result;
}

function validRequired(formField,fieldLabel)
{
  var result = true;
  
  if (formField.value == "")
  {
    formField.focus();
    alert('Please enter any information in the "' + fieldLabel +'" field.');
    result = false;
  } 
  
  return result;
}

function validSelection ( formField, fieldLabel )
{
	var result = true;
	
	if ( formField[0].selected )
	{
	    alert('Please select an option for the "' + fieldLabel + '" field from the drop down list.');
    	result = false;
	}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
  var result = true;
  
  if (required && !validRequired(formField,fieldLabel))
    result = false;

  if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
  {
    alert("Please enter a complete email address in the form: yourname@yourdomain.com");
    formField.focus();
    result = false;
  }
   
  return result;

}


function validNum(formField,fieldLabel,required)
{
  var result = true;

  if (required && !validRequired(formField,fieldLabel))
    result = false;
  
   if (result)
   {
     var num = parseInt(formField.value,10);
     if (isNaN(num))
     {
		alert('Please enter a number for the "' + fieldLabel +'" field.');
    	formField.focus();    
		result = false;
    } else if ( formField.value.length < 10 || formField.value.length > 10 )
	{
	  alert('You entered "' + formField.value.length + '" digit(s).\nPlease enter a ten digits number in the "' + fieldLabel +'" field.');
	  formField.focus ();
	  result = false;
	} 
	else 
   	{
		 for ( i = 0; i <=  formField.value.length; i++ )
		 {
			 if ( isNaN ( formField.value.charAt ( i ) ) ) 
			 {
			 alert ( formField.value.charAt ( i ) + " is not a number." );
			  formField.focus ();
			 result = false;
			 }
		 }
		
	}
  } 
  
  return result;
}

function validDate(formField,fieldLabel,required)
{
  var result = true;

  if (required && !validRequired(formField,fieldLabel))
    result = false;
  
   if (result)
   {
     var elems = formField.value.split("/");
     
     result = (elems.length == 3); // should be three components
     
     if (result)
     {
       var month = parseInt(elems[0],10);
        var day = parseInt(elems[1]);
       var year = parseInt(elems[2],10);
      result = !isNaN(month) && (month > 0) && (month < 13) &&
            !isNaN(day) && (day > 0) && (day < 32) &&
            !isNaN(year) && (elems[2].length == 4);
     }
     
      if (!result)

     {
       alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
      formField.focus();    
    }
  } 
  
  return result;
}

/* realname Company Address Telephone Fax email subject Comments */
function validateForm(theForm)
{
	if (!validRequired(theForm.realname,"NAME"))
		return false;

	if (!validRequired(theForm.Company,"COMPANY"))
		return false;

	if (!validRequired(theForm.Address, "ADDRESS" ) )
		return false;
			
	if (!validNum(theForm.Telephone,"TELEPHONE",true) )
		return false;
	
	if (!validEmail(theForm.email,"EMAIL",true))
    	return false;

	if (!validSelection ( theForm.subject, "SUBJECT" ) )
		return false;

	if (!validSelection ( theForm.forwardto, "CONTACT TO" ) )
		return false;

	if (!validRequired (theForm.Comments,"COMMENTS"))
		return false;
		
	if (!validDate(theForm.birthdate,"Birth Date",true))
    	return false;

  return true;
}