// ###########################################################################
// Field validation functions
// ###########################################################################
function isEmpty(field)
{
	if (field.length == 0)
		return true;
	else if (Trim(field).length == 0)
		
		{
			return true;
		}
	else
		return false;
}

function isInteger(field)
{
	if(isEmpty(field)) return false;
	if (field > 0 )
		return true;
	else
		return false;
}

function isEmail(field)
{
	// E-mail is empty
	if ( isEmpty(field) )
		return false;
		
	var value = new String(field);
	
	// Look for @ symbol
	var pos = value.indexOf('@');

	if ( pos == -1 || pos == 0 || pos == value.length - 1)
		return false;
		
	return true;
		
}