<script>
            function createFile()
            {
                var fileName;
                fileName = prompt("Please enter file name:");
                if (fileName != null)
                {
                    if (fileName.trim() == "")
                    {
                        alert("File name must have some value");
                    } else
                    {
                        var dataString = 'functionName=create_new_file' + "&fileName=" + fileName;
                        $.ajax({
                            type: "POST",
                            url: "database_connections.php",
                            data: dataString,
                            cache: false,
                            success: function (result) {
                                alert(result);
                            }
                        });

                    }
                }
            }
        </script>