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Regular expression + special characters

 
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i need a regular expression for checking the values of a textbox.

The values in the checkbox should be able to accept alphanumeric data but no special characters. It should be able to accept multiple spaces.

Any leds on this
 
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http://www.webreference.com/js/column5/

Eric
 
what if we put solar panels on top of the semi truck trailer? That could power this tiny ad:
We need your help - Coderanch server fundraiser
https://coderanch.com/t/782867/Coderanch-server-fundraiser
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