How to assign C# variable to asp element using javascript -

i want assign csharp variable element of asp page using javascript. seems assignement not working in code.

here is:

document.getelementbyid('lbaccessories').innerhtml = '<%#selectlabel%>'; 

in asp code use:

<asp:linkbutton id="lbaccessories" runat="server" />' 

i can't assign value directly linkbutton using text='<%#selectlabel%>' because want make more intelligent.

does knows how that?

thanks

edit:

here code, i've tried use <%=lbaccessories.clientid%>, generates error : lbaccessories not exist in context.

<script type="text/javascript">     function function(ref) {         if ('<%=textboxclientid%>' == 'txtlink')          {             document.getelementbyid('lbaccessories').innerhtml = '<%#selectlabel%>';         }         else if ('<%=textboxclientid%>' == 'btnsearch') {             document.getelementbyid('lbaccessories').innerhtml = '<%#viewdetail%>';         }     }  </script> 

edit:

<asp:gridview id="gv1" autogeneratecolumns="false" runat="server"      allowpaging="true" onpageindexchanging="pic">     <columns>         <asp:templatefield headertext="">             <itemtemplate>                 <asp:linkbutton id="lbaccessories" runat="server" onclientclick='<%#string.format("passaccessory(\"{0}\");", eval("ref"))%>'></asp:linkbutton>             </itemtemplate>         </asp:templatefield>     </columns> </asp:gridview> 

edit:

thanks had posted suggestions.

i have changed javascript code following:

<script type="text/javascript">     function passaccessory(accessoryref) {          if ('<%=textboxclientid%>' == 'txtlink') {             document.getelementbyid('<%= gvaccessories.findcontrol("lbaccessories").clientid %>').innerhtml = '<%#selectlabel%>';         }         else if ('<%=textboxclientid%>' == 'btnsearch') {             document.getelementbyid('<%= gvaccessories.findcontrol("lbaccessories").clientid %>').innerhtml = '<%#viewdetail%>';         }     } </script> 

in *.aspx.cs file, have added: protected linkbutton lbaccessories { get; set; }

it throws exception:

object reference not set instance of object

anyone have ideas? much

edit:

finally, did csharp code. it's more flexable , manageable. colleague helped me. thank help!!!

check output html whether anchor's id looking for. in case should rather use <%= lbaccessories.clientid %> refering server id client script.

if reason don't want (or cannot) use <%= lbaccessories.clientid %> check following article jquery plugin allows dom element server id:

http://radek-stromsky.blogspot.com/2010/11/aspnet-how-to-get-client-id-with-jquery.html

edit:

i made several changes in code:

<script type="text/javascript">     function passaccessory(ref) {         if ('<%= textboxclientid %>' == 'txtlink')          {             document.getelementbyid('<%= gridview1.findcontrol("lbaccessories").clientid %>').innerhtml = '<%# selectlabel %>';         }         else if ('<%= textboxclientid %>' == 'btnsearch') {             document.getelementbyid('<%= gridview1.findcontrol("lbaccessories").clientid %>').innerhtml = '<%#viewdetail%>';         }     } </script>   <asp:linkbutton id="lbaccessories" runat="server" onclientclick='<%#string.format("passaccessory(\"{0}\");", eval("ref"))%>'></asp:linkbutton> 

edit: edit:

i fixed code above. there gridview1.findcontrol("lbaccessories")