how to activate a textbox if I select an other option in drop down box

Question

suppose I\'ve a 3 options in a drop down box say red , blue, others. If a user select option as an others then below a text box should be visible to wrtie his own favour

Answer 1

Below is the core JavaScript you need to write:

 
  
 


   
    pick a color  
    RED
    BLUE
    others