how to set button to be visible only after i made changes in 2 dropdownlists in javascript
<p>in aspx file I have </p>

<pre><code>&lt;asp:DropDownList ID="DropDownList1" runat="server" &gt;
&lt;/asp:DropDownList&gt;
&lt;asp:DropDownList ID="DropDownList2" runat="server"&gt;
&lt;/asp:DropDownList&gt;
&lt;asp:Button ID="load_data" runat="server" Text="&lt;%$ Resources : load_data %&gt;"  
    onclick="load_data_class_Click" Visible="False"/&gt;
</code></pre>

<p>Now I want to set button to be visible only after i made changes in 2 dropdownlists in javascript</p>

<p>how to do this?</p>
