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Editorial Team
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Asked: 2026-06-17T12:30:54+00:00

I have a page that has the conditional comment: <%@ Page language=c# %> <html>

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I have a page that has the conditional comment:

<%@ Page language="c#"  %>
<html>
  <head>
    <title>ASP.NET Application</title>
    <!--[if lt IE 8]><script type="text/javascript" src="scripts/json_parse.js"></script><![endif]-->
  </head>
  <body>
    test
  </body>
<html>

When I do it like above, it throws a compilation error saying it expects a closing “script” tag. But the below code (which should end up with the same page) works perfectly:

<%@ Page language="c#"  %>
<html>
  <head>
    <title>ASP.NET Application</title>
    <!--[if lt IE 8]>
    <% Response.Write( "<script type=\"text/javascript\" src=\"scripts/json_parse.js\"></script>" ); %>
    <![endif]-->
  </head>
  <body>
    test
  </body>
<html>

Why does it have a problem with IE conditionals? The script tag is inside a comment and is not “runat”.

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1 Answer

  1. Editorial Team

    This is a case where you want the conditional comments to be revealed to downlevel browsers, not hidden by uplevel browsers, so there is a slightly different syntax to use:

    <![if lt IE 8]>
<script type="text/javascript" src="scripts/json_parse.js"></script>
<![endif]>

    See this MSDN article for detailed information.

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