jquery.iscss.js

 $.fn.isCSS = function (properties) {
    var property;
    for (property in properties) {
        if (properties.hasOwnProperty(property)) {
            var required_value = properties[property],
                actual_value = this.css(property);
            //console.log('$.isCSS', property, '=', required_value, required_value != actual_value ? '!=' : '==', actual_value, this[0]);
            if (required_value != actual_value) {
                return false;
            }
        }
    }
    return true;
};

$.fn.getParentsWithCSS = function (properties) {
    var error;
    if (this.length != 1) {
        error = 'Object length (' + this.length + ') is not 1.';
        throw error;
    }
    return this.parents().filter(function () {
        return $(this).isCSS(properties);
    });
};

$.fn.getParentWithCSS = function (properties) {
    var error, $parent = this;
    if (this.length != 1) {
        error = 'Object length (' + this.length + ') is not 1.';
        throw error;
    }
    //try {
        while (($parent = $parent.parent()) && $parent[0] != document && $parent.length) {
            if ($parent.isCSS(properties)) {
                return $parent;
            }
        }
    //} catch (e) {
    //    console.log('getParentWithCSS', e, $parent);
    //}
    // not found!
    return $([]);
};