Ultra-light and simple Accordion With Jquery

Hello,
remember to include jQuery library before the javascript code below.
here is the code:
JS/Jquery:
if($('.faq-post').length){
        var self = $('.faq-body');
        $('.faq-body .faq-answer').hide();
        $('.faq-question').on('click',function(e){
            $('.faq-answer').hide();
            $(this).next().show();
            e.preventDefault();
            return false;
        });
    }
HTML:
<article class="col-xs-12">
<div class="faq-body">
<h5 class="faq-question"><a href="#" title="">Topic heading </a></h5>
<div class='faq-answer'>Content</div>
</div>
</article>
You can add you style as you wish.
Enjoy!!!

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How to check if value is a number (isNumer()) in javascript

After Stubbling at this challenge, i googled and found different solutions include the jQuery implementation of this, but none seems to do what i wanted, they either return true or false.
I wanted to know if a value is a number whether it's a typeof string or number. The codes below did the job very well, unlike !isNaN() or $.IsNumeric() which return true in the case of newline or space.
var isNumber = function(v){
    //return typeof v === 'number' && isFinite(v);
    return !isNaN(parseFloat(v)) && isFinite(v);
}
The commented code is the yahoo UI implementation which i tried but didn't give me what i wanted.
Return false if typeof is 'string' while true if typeof is 'number'. But the uncommented code does the job.

Than you for reading. Please post your comment.