$('#region').empty();

var regions = document.getElementById('region');                 regions.appendChild(document.createElement('option'))

                    var regions = document.getElementById('region');

                    regions.appendChild(document.createElement('option'))

                    for(i=0;i<data.length;i++){

                        var option = document.createElement('option');

                        option.value = data[i];

                        option.text = data[i];

                        regions.appendChild(option);

                    }