Edit in JSFiddle

// Enable this line to validate the form on page load
// $("form").valid();
// Display the result of the form. Only called when validation succeeds!
$("input[type='submit']").click(
    function(event) {
        event.preventDefault(); // Do not actually submit
        alert("You entered " + $("#your-name-id").val() + ", age " + $("#your-age-id").val());
    }
);

<!--

Example of a simple jQuery Unobtrusive Validation form

See http://www.mobzystems.com/blog/setting-up-jquery-unobtrusive-validation/
-->
<form>
    <div data-valmsg-summary="true">
        <ul></ul>
    </div>
    <div>
        <label for="your-name-id">Your name:</label>
        <input type="text" name="yourname" id="your-name-id" placeholder="Please enter your name"
            data-val="true"
            data-val-required="Please enter a name"
            data-val-length="Please enter more than two letters" data-val-length-min="2"
        />
        <span data-valmsg-for="yourname" data-valmsg-replace="true" />
    </div>
    <div>
        <label for="your-age-id">Your age [hint: 10-120]:</label>
        <input type="text" name="yourage" id="your-age-id" placeholder="Please enter your age"
            data-val="true"
            data-val-required="Please enter an age" 
            data-val-number="Please enter a valid number"
            data-val-range="You must be between 10 and 120 years old" data-val-range-min="10" data-val-range-max="120"
        />
        <span data-valmsg-for="yourage" data-valmsg-replace="true" />
    </div>
    <p>
        <input type="submit" value="Go" />
    </p>
</form>
<div>
    <a href="http://www.mobzystems.com/blog/setting-up-jquery-unobtrusive-validation/">View blog entry</a>
</div>
<script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/jquery.validate.min.js"></script>
<script src="//ajax.aspnetcdn.com/ajax/mvc/5.2.3/jquery.validate.unobtrusive.min.js"></script>

/* Show validation results in red */
.field-validation-error {
    color: red;
}
/* Change background color of invalid text inputs to light red */
input[type="text"].input-validation-error
{
    background-color: #fcc;
}