RE: getElementById failing

[Tony Wright]

I seem to recall  that you can set client ids to predictable?

Sent from my Windows Phone
------------------------------
From: Greg Keogh
Sent: 5/01/2012 12:06 PM
To: ozDotNet
Subject: RE: getElementById failing

I just noticed that the IDs don’t match. In the rendered page I see this:



function NoteCheck()

{

  var text =
document.getElementById('ctl00_ContentPlaceHolder1_UMAuthRepeater_ctl01
_converseCtl_conitemCtl_textNote');

  var btn =
document.getElementById('ctl00_ContentPlaceHolder1_UMAuthRepeater_ctl01_converseCtl_conitemCtl_btnConSave');

  var len = text.value.length;

  btn.disabled = (len == 0);

}



<td><input ... 
id="ctl00_ContentPlaceHolder1_UMAuthRepeater_ctl02_converseCtl_conitemCtl_textNote"
onFocus="NoteCheck();" onKeyUp="NoteCheck();"
style="height:60px;width:300px;" /></td>



So my JavaScript logic is probably still correct, but the IDs don’t match.
I also tried <%=textNote.ClientID%> style syntax instead of string.Format,
but it makes no difference. I’ve not seen this mismatching ID problem
before, but at least I now know why it’s crashing, but don’t know the
underlying cause or cure.



Greg