In asp.net refernce a parent page's control from javascript

I had a DropDownList on the page that I reference in JavaScript like this:

var ProjectsDropDownList = '<%= ProjectsDropDownList.ClientID %>';

However, I had to move the DropDownList up to the parent IFr开发者_如何学JAVAame.

How do I reference that control that is now in the parent IFrame from the child IFrame in JavaScript?

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If your control still has the same id after you move it to the parent frame, you can do:

var movedElement = window.parent.document.getElementById(
    "<%= ProjectsDropDownList.ClientID %>");