title: How to change asp.net DropDownList SelectedValue using javascript?
body: <p>I have three dropdownlist controls in my asp.net web app project from which the user will choose items. What I want is that the user must not choose the same values, meaning that the value selected in the one Dropdownlist can not be selected in the other dropdownlist, and if the user tries to select the same value I want to reset the selectedValue property to that dropdownlist. Is there anyway I can achieve this using javascript? It's better to make it on the client side.</p>
  
  <p>Thank you!</p>
  
  <p>The Dropdownlist Looks like this: <a href="https://i.stack.imgur.com/TdjiK.png" rel="nofollow noreferrer">Image here</a></p>