javascript - Change Form Field Visibility in ModalPopupExtender -


wanted know if there's way change form field's visibility within modalpopup (from modalpopupextender) based upon dropdownlist's change in value. page's technique doesn't seem work: change visibility of asp.net label javascript.

javascript:

<script type="text/javascript">     function showhide() {         if(document.getelementbyid('<%=ddlasvisibilitytest.clientid%>') == "show") {             document.getelementbyid('<%=lblasbillingname.clientid%>').style.display = 'inherit';             document.getelementbyid('<%=txtasbillingname.clientid%>').style.display = 'inherit';         }         if(document.getelementbyid('<%=ddlasvisibilitytest.clientid%>') == "hide") {             document.getelementbyid('<%=lblasbillingname.clientid%>').style.display = 'none';             document.getelementbyid('<%=txtasbillingname.clientid%>').style.display = 'none';         }     { </script>

asp.net:

<asp:modalpopupextender okcontrolid="btnasokay" cancelcontrolid="btnascancel" backgroundcssclass="modalbackground" dropshadow="true" id="btnaddsupplier_modalpopupextender" runat="server" dynamicservicepath="" enabled="true" targetcontrolid="btnaddsupplier" popupcontrolid="pnladdsupplier">     <animations>         <onshown>             <fadein duration="0.25" fps="40" />         </onshown>         <onhiding>             <fadeout duration="0.25" fps="40" />         </onhiding> </animations> </asp:modalpopupextender> <asp:roundedcornersextender id="rce" runat="server" targetcontrolid="pnladdsupplier" radius="6" corners="all" /> <asp:button id="btnaddsupplier" runat="server" cssclass="buttonsmall" text="add suplier" /> <asp:panel id="pnladdsupplier" cssclass ="panel" runat="server">     <div class="asheader">         <asp:label id="lblasheader" runat="server" text="add supplier" cssclass="bodytxt" font-bold="true"></asp:label>     </div>     <div class="asinputs">         <asp:table runat="server">             <asp:tablerow id="trasvisibilitytest" runat="server">                 <asp:tablecell id="tclblasvisibilitytest" runat="server"><asp:label id="lblasvisibilitytest" runat="server" text="test visibility" cssclass="bodytxt" font-bold="false"></asp:label></asp:tablecell>                 <asp:tablecell id="tcddlasvisibilitytest" runat="server"><asp:dropdownlist id="ddlasvisibilitytest" runat="server" onchange="showhide()">                     <asp:listitem>show</asp:listitem>                     <asp:listitem>hide</asp:listitem>                 </asp:dropdownlist></asp:tablecell>             </asp:tablerow>             <asp:tablerow id="trasbillingname" runat="server">                 <asp:tablecell id="tclblasbillingname" runat="server"><asp:label id="lblasbillingname" runat="server" text="supplier's billing name" cssclass="bodytxt" font-bold="false" style="display: none;"></asp:label></asp:tablecell>                 <asp:tablecell id="tctxtasbillingname" runat="server"><asp:textbox id="txtasbillingname" cssclass="bodytxt" runat="server" style="display: none;"></asp:textbox></asp:tablecell>             </asp:tablerow>         </asp:table>     </div>     <div class="divascontrols" align="center">         <asp:button id="btnasokay" runat="server" cssclass="buttonsmall" text="add supplier" style="display: none;" />         <asp:button id="btnascancel" runat="server" cssclass="buttonsmall" text="cancel" />     </div> </asp:panel>

thanks lot in advance!

it doesn't checking value/text of dropdown. instead, comparing control value of "show" or "hide". try changing code , see if helps:

<script type="text/javascript">     function showhide()      {         var visibilityelem = document.getelementbyid('<%=ddlasvisibilitytest.clientid%>');         var visibilityelemtext = visibilityelem.options[visibilityelem.selectedindex].text;         var display = (visibilityelemtext == 'show') ? 'inherit' : 'none';          document.getelementbyid('<%=lblasbillingname.clientid%>').style.display = display;         document.getelementbyid('<%=txtasbillingname.clientid%>').style.display = display;     } </script>

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