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POEnable and disable button using javascript and asp.net
 

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    <p>I am checking if user exists in database if exists I am showing message as "existed user" and then I need to disable the signup button if not I need to enable it.</p> <p>I am unable to enable and disable the sign Up button.</p> <p>Can anyone help me in this issue?</p> <p>Here is my code:</p> <pre><code> &lt;script type="text/javascript"&gt; $(function () { $("#&lt;% =btnavailable.ClientID %&gt;").click(function () { if ($("#&lt;% =txtUserName.ClientID %&gt;").val() == "") { $("#&lt;% =txtUserName.ClientID %&gt;").removeClass().addClass('notavailablecss').text('Required field cannot be blank').fadeIn("slow"); } else { $("#&lt;% =txtUserName.ClientID %&gt;").removeClass().addClass('messagebox').text('Checking...').fadeIn("slow"); $.post("LoginHandler.ashx", { uname: $("#&lt;% =txtUserName.ClientID %&gt;").val() }, function (result) { if (result == "1") { $("#&lt;% =txtUserName.ClientID %&gt;").addClass('notavailablecss').fadeTo(900, 1); document.getElementById(#&lt;% =btnSignUp.ClientID %&gt;').enabled = false; } else if (result == "0") { $("#&lt;% =txtUserName.ClientID %&gt;").addClass('availablecss').fadeTo(900, 1); document.getElementById('#&lt;% =btnSignUp.ClientID %&gt;').enabled = true; } else { $("#&lt;% =txtUserName.ClientID %&gt;").addClass('notavailablecss').fadeTo(900, 1); } }); } }); $("#&lt;% =btnavailable.ClientID %&gt;").ajaxError(function (event, request, settings, error) { alert("Error requesting page " + settings.url + " Error:" + error); }); }); &lt;/script&gt; </code></pre>
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    1. COAnd your problem is? How can someone help you now?
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    2. COMy problem is unable to disable and enable the signup button.If username existed I need to disable it and if not I need to enable it.
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