$.ajax({

    url  : "request/register.php",
    type : "POST",
    data : 'firstName='+firstName + '&lastName='+lastName + '&userName='+userName + '&email='+email + '&password='+password + '&con_password='+con_password,
    dataType : "text",
    beforeSend : function(http){
       $('#reg').val("Submitting....");
    },
    success : function(response,status,http){
        var text = response;
        console.log(text);
    },
    error : function(http,status,error){
        alert('server error');
    }