Want to show a message box using javascript
<p>Hi everyone I have a web form in which I am having a button on clicking which data back up is being taken, I used the following javascript :</p>

<pre><code>&lt;script language="javascript" type="text/javascript"&gt;
   function showPleaseWait() {
       document.getElementById('PleaseWait').style.display = 'block';
   }
&lt;/script&gt;

&lt;asp:Button ID="btnTakebackup" runat="server" Text="Take Backup"  Enabled="true" 
   onMouseDown="showPleaseWait()" CausesValidation="false" /&gt;

&lt;div id="PleaseWait" style="display: none;"&gt;"Please Wait Backup in Progress.."&lt;/div&gt;
</code></pre>

<p>Hi I am using a button to take a back up.</p>

<p>Now I want to show a message in <code>btnTakebackup_Click()</code> event, whether Back up was successful or not.
I used <code>Response.Write("&lt;script&gt;alert('abcd');&lt;/script&gt;");</code> in <code>btnTakebackup_Click()</code> event.
But the problem is that I want to show the page also, which is not showing instead white background is showing.</p>

<p>Thanks in advance...</p>
