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Answer 1

A:

If it's the only button in your div, this should work:

var btnref = document.getElementById("controls").getElementsByTagName("button")[0];

peirix 2010-01-15 14:14:04

an `asp:Button` renders an `input type="button"`, not a `button`, and that's a vastly unnecessary assumption to make about the DOM *and* a slow means of finding the element, when it does indeed have an id. Any future change of the site, or even a simple greasemonkey script could easily break that approach, for instance.

David Hedlund 2010-01-15 14:22:18

Answer 2

+1 A:

Have you tried right-clicking in the document and selecting "view source" to see how that code actually renders? An asp:Button is a server control, that gets translated to an input field during render. During this, the ID of the field will not be exactly what you set it to in your aspx.

You can use Export1.ClientID at serverside to get the ID of the control.

David Hedlund 2010-01-15 14:14:50

This (and the next answer) are working...I did know that, but just totally forgot it -_-Thanks a lot!

powerbar 2010-01-15 14:24:04

glad to hear it worked out for you. for the record, for most of us posts are being sorted by votes, and within the same amount of votes, posts are showing up in random order, so there's no way for the rest of us to know what you refer to when you say 'the next answer' =)

David Hedlund 2010-01-15 14:26:11

Answer 3

A:

Usually the id of the button won't stay the same in the page source. Click on view source in the HTML and look for that tag to find the new id. You can then use that id in something like:

document.getElementbyId("Export1_some_unique_id")...

Makram Saleh 2010-01-15 14:14:52

if would be preferable not to hard code the id for the very reason that it varies. `document.getElementById('<%=Export1.ClientID%>');` would be one way of doing that. hard-coding the id can cause the script to break for reasons that the user might have thought entirely unrelated to the script, such as upgrading framework versions, which has in some versions come with minor changes in how IDs are being genrated.

David Hedlund 2010-01-15 14:24:41

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Get Element in div with Javascript

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