function checkIfLoginCredentialsAreAppropriate()
{
	var isLoginIdEmpty = true;
	var isPasswordEmpty = true;	
	var isEmailAddressValid = false;
	var returnValue = false;
	
	if(document.getElementById("user_id").value == "" || document.getElementById("user_id") == null)
	{
		isLoginIdEmpty = true;		
		alert("Username Required!");
	}
	else
	{
		isLoginIdEmpty = false;
		isEmailAddressValid = true;

		// check if email address provided is valid
//		if (isValidEmail(document.getElementById("user_id").value))
//		{
//		}
//		else
//		{
//			isEmailAddressValid = false;
//			alert('Please provide a valid email address as Username.');
//		}
	}
	
	if (document.getElementById("password").value == "" || document.getElementById("password") == null)
	{
		isPasswordEmpty = true;
		alert ("Password Required!");
	}
	else
	{
		isPasswordEmpty = false;
	}	
	
	if (isLoginIdEmpty == true || isPasswordEmpty == true || isEmailAddressValid == false)
	{
		returnValue = false;
	}
	else
	{
		returnValue = true;
	}		
	return returnValue;
}

function isValidEmail(strEmailProvided){
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
    if (strEmailProvided.search(validRegExp) == -1) 
   {      
      return false;
   } 
    return true; 
}