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Need help with javascript validation

 
Greenhorn
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Please help with my project.


I got a list of Item that can be filled.
But i duno how to validate the 'Quantity' field only and only if the user select an item in the 'Item' field.
The validation on javascript should be done when user clik the submit button.
 
Ranch Hand
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Here is my suggestion (it may not be exact but something similar):

 
David kio
Greenhorn
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opps, sorry....

Thanks anyway, i just solve the problem already.

 
Don't get me started about those stupid light bulbs.
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