How To Retrieve Value From Textbox From Javascript

May 5, 2010

I have an asp.net web form with a couple of asp.net textbox controls:

<asp:TextBox ID="txtTextBox" runat="server" /> .

I have a javascript file tools.js that are included in the page:

<script src="tools.js" type="text/javascript"></script>

How can I access the value from txtTextBox from javascript?

Ive tried using

document.getElementById('<%= txtTextBox.ClienID %>').value;
document.getElementById('<%= txtTextBox.UniqueID %>').value;
document.getElementById('<%= txtTextBox %>').value;

but none of them works.

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