How to use JavaScript variable from popup window in code behind?
<p>I have ASP.NET web application that contains master page. Master page contains content page. Content page contains user control. User control contains Telerik grid with its context menu.</p>

<p>I'd like to click the item in grid's context menu and open new popup modal window. In that window there's drop down list. I pick up some option from drop down list and click OK. I'd like to get the value selected from drop down list and use it in my ASP.NET code to proceed further.</p>

<p>I've tried to use hidden field to store the value from drop down list but it doesn't work because I'm not sure where hidden field should be placed.</p>

<p>Could someone help me to make it work?</p>
