How to find script tag from string with JAVASCRIPT/ regular expression

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Javascript

regular-expression

Hi All,

I need to validate the incoming string for text "<script".

Eg: string a = "This is a simple <script> string";
Now I need to write a regular expression that will tell me, whether this string contains <script> tag or not.

I ended up writing something like: <*?script.*?>

But the challenge is,
Incoming string may contain script in following ways,

1. string a = "This is a simple <script> string";
2. string a = "This is a simple < script> string";
3. string a = "This is a simple<javascript></javascript> string";
4. string a = "This is a simple <script type=text/javascript> string";

Hence the regular expression should check for starting "<" tag and then it should check for "script"

Please suggest.