Javascript : Dropdown on the fly

Create DROPDOWN on the fly with help of Javascript

1. Create 'Select' obj
select_obj= document.createElement("select");

2. Create 'option' object
var op = new Option();

3. Add name and value to the 'Option'
op.value = 1;
op.text = "One";

4. Add Option

select_obj.options.add(op);    

5. Remove Option

select_obj.options.remove(op);