jQuery(document).ready(function($) {
    //add popup functionality to all image links
    $('a[href*=".jpg"], a[href*=".jpeg"], a[href*=".png"], a[href*=".gif"]').magnificPopup({type:'image'});
    //initialize for wordpress galleries
    $('.gallery').magnificPopup({
        delegate: 'a',
        type: 'image',
        gallery: {
            enabled: true
        }
    });
});