regex - Client side validation, Regext to match tag,or how to validate blog post to prevent script posting -

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I was looking for regex to match the speed tag, I used ASP.NET MVC 3.0 humorous recognition I am here.

I get this regexp "^ [[script | (| | | \ N)? & Gt; (| | \ N) *? & Lt; / script & gt;] * $" found

How to fix this?

Here are some examples:

Here are some examples:

1) 

  & lt; Script & gt; Warning ("a"); & Lt; / Script & gt; & Lt; Div style = "clear: both" & gt; & Lt; Br / & gt; & Lt; / Div & gt;   
 2)  
  & lt; Script src = "/ anypath" type = "text / javascript" & gt; Antything & lt; / Script & gt; & Lt; Div style = "clear: both" & gt; & Lt; Br / & gt; & Lt; / Div & gt;   
 3)  
  & lt; Div style = "clear: both" & gt; & Lt; Br / & gt; & Lt; / Div & gt; & Lt; Script & gt; & Lt; / Script & gt;   
 What I'm doing - I want to validate blog post input to stop the post script as a part of the blog post.   
 
 
 I think you will match the script tag with simple regex:  
  (& lt; script. *? & Gt;. *? & Lt; / script & gt;)

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