Dropdown is the best way to force user to select any one option by giving him\/her a list of options. But sometimes there is a dependency to select next option which is based on previous option.<\/p>\n

Just like, if you are in a shopping cart website trying to purchase any product. First you must select a country then website automatically populates a list of cities based on your selection.<\/p>\n

This whole process from country to cities is based on AJAX<\/a>. First shopping cart website shows country in a dropdown from database<\/a> and when user select any country then cities are populated under countries dropdown.<\/p>\n

So in this tutorial we are going to cover this process.<\/p>\n