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validation check phone field

 
Ranch Hand
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how can i check the textbox only contain numeric ,not letter such as phone no field in javascript
 
Java Cowboy
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You can use regular expressions for this.

Googling for javascript phone number validation gives some links that look interesting.

(Note: JavaScript doesn't have anything to do with Java. We do have a forum about HTML and JavaScript here, so I've moved your question there for you).
 
Rancher
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Regular expressions would be one way. But be aware that many people enter phone numbers containing characters such as + / - ( ) or . - you need to account for that in some way. Or you can just remove everything that is not a number after they've entered it. Of course, "+491234567890" is not the same phone number as "491234567890", just in case you need to handle international numbers.
 
Don't get me started about those stupid light bulbs.
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