Simple JQuery Validation

Add data-validate with the validation function you want to run

<input id="name" type="textbox" data-validate="required" />

Add data-validate with multiple validation functions separated by a ' '

<input id="email" type="textbox" data-validate="required email" />

Create a location for error messages to appear

<div id="errors">&nbsp;</div>

Include a 'validate' class on the form you want to validate

<form method="post" action="/some_url" class="validate">

Wire up the forms you want to validate

    $(document).ready(function () {
        $("form.validate").validate('#errors');
    });

Extend with your own validation functions and messages if you want

    var validation_functions = {
        check: function(element)
        {
            return jQuery.trim(element.value) == "the dude";
        }
    };

    var validation_messages = {
        check: "does not match."
    };

    simple_validation.extend(validation_functions, validation_messages);