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Asked: 2026-05-13T10:31:12+00:00

I want to disable/enable a button with JavaScript. Because the JavaScript is called, after

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I want to disable/enable a button with JavaScript. Because the JavaScript is called, after a Flash animation is rendered, the button exists at the time of the execution.

The button is in a hierarchy:

<html><body><form#form1><div#control><asp:Button#Export1>

I tried for hours to get a reference to that button, but nothing seems to work:

document.getElementById("Export1")
// and
document.getElementbyId("form1").getElementById("control").getElementById("Export1")
// and many more

How to get a reference to that button (in order to change btnref.disabled = true)?

Thanks a lot for your help!

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1 Answer

  1. Editorial Team

    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.

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