Contact Form Validation

$.fn.wpcf7NotValidTip = function(message) {
        return this.each(function() {
            var into = $(this);

            $parentSpan = $(this).parent("span");
            if($parentSpan){ alert("Found Parent = Span"); } //working
            $parentDiv = $parentSpan.parent("div");
            if($parentDiv){ alert("Found Grand Parent = Div"); } //working

            $parentDiv.css("background","red"); //not working

            into.append('<span class="wpcf7-not-valid-tip">' + message + '</span>');
            $('span.wpcf7-not-valid-tip').mouseover(function() {
                $(this).fadeOut('fast');
            });
            into.find(':input').mouseover(function() {
                into.find('.wpcf7-not-valid-tip').not(':hidden').fadeOut('fast');
            });
            into.find(':input').focus(function() {
                into.find('.wpcf7-not-valid-tip').not(':hidden').fadeOut('fast');
            });
        });
    };