Edit in JSFiddle

<!-- simply add .ws-validate to your form and you get nice inline form validation -->
<form action="#" class="ws-validate">
    <div class="form-row">
        <div>
            <input type="password" placeholder="password" id="password" required="" />
        </div>
        <!-- using the data-errormessage[errortype] -->
        <div>
            <input data-dependent-validation="password" type="password" placeholder="repeat password" data-errormessage-dependent="you have to confirm your password!" />
        </div>
    </div>
    <div class="form-row">
        <div>
            <input type="password" placeholder="password" id="password2" required="" />
        </div>
        <!-- using the ival feature -->
        <div>
            <input data-dependent-validation="password2" type="password" placeholder="repeat password" required="" />
            <div class="ws-errorbox" hidden="">
                <p data-errortype="dependent">you have to confirm your password!</p>
            </div>
        </div>
    </div>
    <div class="form-row">
        <input type="submit" />
    </div>
</form>

webshim.setOptions('forms', {
    lazyCustomMessages: true,
    addValidators: true
});

//start polyfilling
webshim.polyfill('forms forms-ext');

div.ws-invalid input {
    border-color: #c88;
}
.ws-invalid label {
    color: #933;
}
div.ws-success input {
    border-color: #8c8;
}
form {
    margin: 10px auto;
    max-width: 400px;
    min-width: 220px;
}
.form-row {
    padding: 5px 10px;
    margin: 5px 0;
}
label {
    display: block;
    margin: 3px 0;
}
.form-row input {
    width: 220px;
    padding: 3px 1px;
    border: 1px solid #ccc;
    box-shadow: none;
}
.form-row input[type="checkbox"] {
    width: 15px;
}
}