I just wrote some functions which i have found very useful. previously i was only using _in and _near to test several features on my website.

I have found that during my testing, i needed to test whether something was next to, above or above and below an element: code below.

<browser>
function nextTo ($element1, $element2){
    var $heightEl1 = _position($element1)[1];
    var $heightEl2 = _position($element2)[1];
    if ($heightEl1 == $heightEl2){
        return true;
    }
    return false;
}

function above($element1, $element2){
    var $heightEl1 = _position($element1)[1];
    var $heightEl2 = _position($element2)[1];
    if ($heightEl1 < $heightEl2){
        return true;
    }
    return false;
}

function belowAndAbove($element1, $belowElement, $aboveElement){
    var $heightEl1 = _position($element1)[1];
    var $heightEl2 = _position($belowElement)[1];
    var $heightEl3 = _position($aboveElement)[1];
    if ($heightEl1 > $heightEl2){
        if ($heightEl1 < $heightEl3){
            return true;
        }
    }
    return false;
}
</browser>

usage is:

_assertTrue(nextTo(_textbox("username"),_label("Username")));
_assertTrue(above(_textbox("username"),_password("password")));
_assertTrue(belowAndAbove(_password("password"), _textbox("username"), _submit("Login")));

Hope that this is useful.