Problema con hacks "Coditional Comments" para IE6.

[hey_alan]

Hola a todos.

Tengo lo siguiente en mi cabecera:

Código HTML:

<script type="text/javascript" src="js/jquery.js"></script>
<![if !lt IE 7]><script type="text/javascript" src="js/menu.js"></script><![endif]> 
<![if !lt IE 7]><script type="text/javascript" src="js/slideshow.js"></script><![endif]>  
<!--[if lt IE 7]><script type="text/javascript" src="js/pngfix.js"></script><![endif]-->
 

Lo que quiero es que "menu.js" y "slideshow.js" no sean leídos si el navegador es IE y una versión anterior a la siente.

El código funciona, pero al checarlo en W3C me dice esto:

Error Line 12, Column 4: "if" is not a reserved name

<![if !lt IE 7]><script type="text/javascript" src="js/menu.js"></script><![end…


Line 12, Column 7: character data is not allowed here

<![if !lt IE 7]><script type="text/javascript" src="js/menu.js"></script><![end…

✉

You have used character data somewhere it is not permitted to appear. Mistakes that can cause this error include:

* putting text directly in the body of the document without wrapping it in a container element (such as a <p>aragraph</p>), or
* forgetting to quote an attribute value (where characters such as "%" and "/" are common, but cannot appear without surrounding quotes), or
* using XHTML-style self-closing tags (such as <meta ... />) in HTML 4.01 or earlier. To fix, remove the extra slash ('/') character. For more information about the reasons for this, see Empty elements in SGML, HTML, XML, and XHTML.

¿Cuál sería una forma válida?

Gracias.