Can’t access CommandArgument (LinkButton) in Javascript

Problem:
Cannot access CommandArgument value of ASP LinkButton from Javascript function

Solution:
Instead going for CommandArgument, there is a rather simple workaround to this. LinkButton has a “title” attribute and it can be used to pass values to Javascript function.

<script type="text/javascript">
function demo(sender){
      alert(sender.title);
}
</script>

<asp:LinkButton ID="LinkButton1" runat="server"
OnClientClick="javascript:return demo(this);"
CausesValidation="false"
CommandName="name"
Text='<%# Eval("[ name]") %>'
title='<%# Eval("[ name]") %>'
CommandArgument='<%# Eval("[Id]") %>'>click</asp:LinkButton>

Source: http://forums.asp.net/p/1414937/3121669.aspx#3121669