title: Passing 3 textbox values to a javascript function from ASPX
body: <p>I want to pass three textbox values to a javascript function. However its not working.Any help is really appreciated.This is what I have tried.</p>
  
  <pre><code>&lt;asp:ImageButton ID="ibut_cheque2" runat="server" target="_blank"
  OnClientClick='&lt;%# string.Format("window.open(\"Product.aspx?pid=\" +
  document.getElementById(\"{0}\").value &amp; chdate=\" + 
  document.getElementById(\"{1}\").value &amp; pname=\" + 
  document.getElementById(\"{2}\").value, 
  null,\"scrollbars=yes,top=10,left=10\", \"true\");", 
  Form.FindControl("txt_voucher").ClientID,
  Form.FindControl("txtbox_chqdate").ClientID,
  Form.FindControl("txtbox_chprovider").ClientID)%&gt;'
  AlternateText="Print" CssClass="btn5" ForeColor="White" ToolTip="Print Cheque" /&gt;
  </code></pre>