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How to put javascript validation to avoid special characters except comma ?

 
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Hi,

I need to put a javascript validation on a text field that is :
No special character is allowed in User Name field except comma.
Please let me know how to do this ?


Thanks,

 
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Moving to our JavaScript / HTML forum.

One note: keep in mind that JavaScript can be turned off. It's fine to do client-side validation in JS, but don't forget to copy this validation on the server.
 
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Where's your code? What problems are you having with it?
 
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