function isValidEmailAddress(emailAddress) {
    var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);  
    return pattern.test(emailAddress);  
}

$(document).ready(function() {
    $('#newsletter_email').focus(function(){
          if( $(this).val() == 'Enter your email address' )
            $(this).val('');
    });
    
    $('#newsletter_email').blur(function(){
         if( $(this).val() == '' )
            $(this).val('Enter your email address');
    });
    
    $('#newsletter_email').keypress(function(event){
        if (event.keyCode == '13') {
            event.preventDefault();
            $('#subscribe-button').click();
        }
    });
    
    $('#subscribe-button').click(function(){
        var email = $('#newsletter_email').val();
        
        if( email == 'Enter your email address'){
            $('#newsletter_email').focus();
            return;
        }
            
            
         if( !isValidEmailAddress(email) ){
            alert('Please enter a valid email address');
            $('#newsletter_email').select();
         } else {
            $.get('http://www.cheaptickets.ca/subscribe.php?email=' + email, function(data) {
              if(data == '1'){
                alert("You've successfully subscribed to our mailling list");  
                $('#newsletter_email').val('');
              }
              else
                alert('An error occured, please try again!');
            }); 
         }
    });
});