What is ew: Managing calendars in aspx

I took the code from my friend. this code contains this element on an aspx page:

<ew:CalendarPopup

When I put a mouse on it, I received this message:

Element 'CalendarPopup' is not known element. This can occur if there is a compilation error in the web site, or the web config file is missing.

I have a web config file.

Edit

I found this in web.config file

<controls>
                <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
                <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            </controls>
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2 answers

It looks like he used Excentrics World (hence "ew:"). There's a demo here that doesn't seem to work in chrome.

You can download your entire management set here .

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"EW" can be defined on the page in the tag Registeras follows:

<%@ Register TagPrefix="ew" Assembly="WhateverEwIs.Web" Namespace="WhateverEwIs.Web" %>

Web.Config system.web > pages > section, :

  <system.web>
    <pages>
      <controls>
        <add tagPrefix="ew" namespace="WhateverEwIs.Web" assembly="WhateverEwIs.Web" />
        <add tagPrefix="ew2" tagName="CalendarPopup" src="~/userControls/CalendarPopup.ascx" />
      </controls>
    </pages>
  </system.web>
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