Trigger a page change based on a textbox edit

My problem is that, I want to call a code behind function from a JS. So that I can implement TextBox on Click event. I am NEW in JS so bear with me on this one...What I heard is that from the client side scripting you cannot call anything to the server (code behind). Here is my code:

 <script type="text/javascript">
       function callCodeBehind() {
       <% txtAgentName_TextChanged(); %>
       }

 </script>

This is my Textbox:

 <asp:TextBox ID="txtAgentName" runat="server" Onclick = "callCodeBehind()"></asp:TextBox>

This is my code behind:

 protected void txtAgentName_TextChanged()
    {

    }

This function is开发者_开发问答 getting fired on Page_Load(), which I don't want it to. All I want is that to call this function txtAgentName_TextChanged() when user clicks on txtAgentName textbox.

Help!

For simplicity, you can use page methods. Check below articles for exact instructions.

Using Page Methods in ASP.NET AJAX

Using jQuery to directly call ASP.NET AJAX page methods

I think what you are looking for is AJAX. Check out the sample in the link.

You CAN call code behind from server using AJAX and jQuery library, just google it. e.g. http://blogs.sitepoint.com/ajax-jquery/

A second issue is that the btn.click() will not work cross-browser.

you can insert a code behind method like this:

<% method(); &>