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I am using jquery form validation plugin
http://docs.jquery.com/Plugins/Validation/validate
How can I set a callback which will be get called before calling it’s validation function ?
I want to trim the values and some pre-validation.
addMethod() lets you create own validation method instead of using predfined ones. Within method do the processing necessary.
For example for trimming you could trim the value, and replace it in field…and test against the trimmmed value. Otherwise using change event handlers on fields would likely help also
http://docs.jquery.com/Plugins/Validation/Validator/addMethod#namemethodmessage