When we think about countries collection in our programming knowledge we must first think there would database collection, but in magento that doesn’t happen. That happens through XML files and loads on each request, it doesn’t store country information in
create dynamic drop-down list
How to create dynamic drop-down list in javascript depending on each other.Lets see below simple example which has shown two drop down list .One is depending upon the other like second dropdown values will be depend upon the first one.Means