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Using an external JavaScript file, simply define the rules for how each field should be validated and you're set. Piece of cake! And since it is it's own .js file, it's easy to use the code on every page of your site. Currently only validates text, numbers and e-mail addresses.
apple:
Required
peach:
Required - minimum 4 characters
cherry:
Required - maximum 8 characters
melon:
Required - minimum 4 characters - maximum 8 characters
banana:
Required - Must be a numeric character
grape:
Required - Must be a numeric character - minimum 3 digits
carot:
Required - Must be a numeric character - maximum 6 digits
sugar:
Required - Must be a numeric character - minimum 4 digits - maximum 6 digits
fruit:
Required - Valid e-mail
candy:
Not required

The JavaScript Source: Forms: External JS

Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s). The script is yours!!!

    

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