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WEIRD! Javascript to get a panels id when in masterpage:  ctl00_ problem

Posted on 2009-05-11
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Last Modified: 2012-05-06
Hi all,
Weird weird one this.
I have a page that has a panel "PopupPanel" that i show and hide with little javascript function.
Since the panel is in a custom control in a content placeholder in a masterpage .. the id of the field changes to:
ctl00_ContentPlaceHolder1_SelectMultipleUsers1_PopupPanel

i.e.
<div id="ctl00_ContentPlaceHolder1_SelectMultipleUsers1_PopupPanel" class="PopupPanel" style="display:none;">

This is pretty annoying but I worked around it by using the created name in the javascript

var theDiv = document.getElementById("ctl00_ContentPlaceHolder1_SelectMultipleUsers1_PopupPanel");

This is all fine until i put it on a different server and for some unknow reason its changed the prefix!! Its now:
_ctl0_ContentPlaceHolder1_SelectMultipleUsers1_PopupPanel

I dont know whats different on that server but the server admin has told me they should be the same! I was never 100% happy using the full name but ah well.

So my question is:
Is there any way to specify what prefix is used with master pages / controls?

Failing that would anyone know of a better way to get the panel in javascript?
Thanks in advance
O
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Question by:osion
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Accepted Solution

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mohan_sekar earned 500 total points
ID: 24355472
Your controlname.ClientID in your javascript instead of hardcoding the control name

example: document.getElementById("<%=PopupPanel.ClientID%>")
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Author Closing Comment

by:osion
ID: 31580176
wow! that was fast! thanks a million.. saved ages of time fiddling around with that!
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