I'm using two drop down list in a form. I have generated the first drop down list from MySQL database with the help of PHP. When i select an option from first drop down list, i have to generate second drop down list options by the selected value of first drop down list from MySQL database.

For example, the first drop down list contains Animals, Birds... If i select the Animal option, the second drop down list should show like Lion,...

I'm using two drop down list ina form. I have generated the first drop down list from MySQL database. When i select an option from first drop down list, i have to generate second drop down list options by the selected value of first drop down list from MySQL database.

For example, the first drop down list contains Animals, Birds... If i select the Animal option, the second drop down list should show like Lion, Tiger....
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