forms - Validating name field using jquery -

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actually new jquery web designing

now need piece of code invoke after blur event on text box.

i need jquery code validating name field in html form.

make sure add latest version of jquery.... here sample validating not null.

    $(document).ready(function() {         $('input#fname').on('blur', function() {             if( $(this).val() == ''  || $(this).val() == "null" {                 // code handle error             } else {                             return true;                     }         })     });

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