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.search(/\S/)==-1)

	{

		alert('Please enter a value for the "' + fieldLabel +'" field.');

		formField.focus();

		result = false;

	}

	

	return result;

}



function allDigits(str)

{

	return inValidCharSet(str,"0123456789.");

}



function inValidCharSet(str,charset)

{

	var result = true;



	// Note: doesn't use regular expressions to avoid early Mac browser bugs

	for (var i=0;i < str.length;i++)

		if (charset.indexOf(str.substr(i,1))<0)

		{

			result = false;

			break;

		}

	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 validPassword(formField,fieldLabel,required)

{

	var result = true;

	if (required && !validRequired(formField,fieldLabel))

		result = false;

	if (result && ((formField.value.length < 5)) )

	{

		alert("Your password must be equal or greater than 5 digits");

		formField.focus();

		result = false;

	}

  return result;

}



function chkPassword(formField1,formField2,required)

{

	var result = true;

	if (result && ((formField1.value!=formField2.value)))

	{

		alert("Your both values do not match");

		formField1.focus();

		result = false;

	}

  return result;

}



function validNum(formField,fieldLabel,required)

{

	var result = true;



//	if (required && !validRequired(formField,fieldLabel))

//		result = false;

  

//	if (result)

// 	{

 		if (!allDigits(formField.value))

 		{

 			alert('Please enter a number for the "' + fieldLabel +'" field.');

			formField.focus();		

			result = false;

		}

//	} 

	

	return result;

}





function validInt(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;

		}

	} 

	

	return result;

}