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POHow do I refer to ASP.NET Controls in Javascript?
 

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  1. POHow do I refer to ASP.NET Controls in Javascript?
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    <p>I'm working on My First ASP.NET Application. I have created some text boxes and buttons, and added client-side validation to the text boxes. I now wish to set and clear the enabled property of the buttons according to the contents and validity of the text boxes.</p> <p>I have studied the questions and answers <a href="https://stackoverflow.com/questions/2155508/user-controls-in-asp-net-prefixing-string-to-child-controls-causing-problem-to-re">here</a>, <a href="https://stackoverflow.com/questions/384867/properly-referencing-controls-in-asp-net-user-controls-in-javascript">here</a>, <a href="https://stackoverflow.com/questions/2246595/grabbing-asp-net-controls-in-javascript">here</a> and <a href="https://stackoverflow.com/questions/1112274/refering-to-controls-through-javascript-function">here</a>, and the best I have been able to manage is this...</p> <pre><code>&lt;script language="javascript" type="text/javascript"&gt; function SetButtonSensitivity() { var label = document.getElementById("&lt;%= lblResult3.ClientID %&gt;"); var button = document.getElementById("&lt;%= btnDone.ClientID %&gt;"); if (Page_ClientValidate()) { label.Text = "valid"; button.disabled = false; } else { label.Text = "not valid"; button.disabled = true; } } &lt;/script&gt; </code></pre> <p>I can tell this script is invoked when I tab away from the textbox fields, as the error messages are emitted by the client-validate, but the script has no effect on the button or the label.</p> <p>Can anyone see what I have overlooked?</p>
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