Asp:Button is not Disabled

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I have Button in asp:update panel.

<asp:Button ID="btnlaunch" runat="server" CssClass="btn_def marr_5 flt_left" Visible="false" OnClick="btnlaunch_Click" OnClientClick="javascript:disableRequestbtn();"/>

and My JavaScript

XML

<script type="text/javascript">
                                       function disableRequestbtn() {

                                           document.getElementById('<%= btnlaunch.ClientID %>').disabled = true;

                                           document.getElementById('<%= btnlaunch.ClientID %>').removeAttribute("class");

                                           alert("gg");
                                        }
                                    </script>

but its not disabled button & dont remove Class property whats the problem with it.

Posted 5-Feb-15 19:59pm

vatsaldesai

Updated 8-Feb-15 20:20pm

v2

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jaket-cp 6-Feb-15 10:45am

I assume the ContentPlaceHolderID="head" is in for the html head.
Is there one for the body?

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Suvendu Shekhar Giri · Answer 1 · 2015-02-08T20:38:00

Initially you have made the button visible=false and then later I assume, you have made it visible=true. Problem is although it is now updated through update panel but Javascript may fail to find it.

Try setting visibility false through CSS like

ASP.NET

<asp:button id="btnlaunch" runat="server" cssclass="btn_def marr_5 flt_left" style="display:none;" onclick="btnlaunch_Click" onclientclick="javascript:disableRequestbtn();" xmlns:asp="#unknown" />

Hope, that helps :)