gistfile1.txt

$(document).ready(function()
{

    var pswpElement = document.querySelectorAll('.pswp')[0];

    var items = [];

    $(".large-image").each(function(index)
    {
        $(this).removeClass("hidden");
        items.push({
            src: $(this).attr("src"),
            w:  $(this).width(),
            h: $(this).height()      
        });
        $(this).addClass("hidden");
    });

    var params = getQueryParams(document.location.toString());

    var currentGalleryID = params["pid"];
    
    if(currentGalleryID != null && currentGalleryID != '')
    {
        var options = {
            // optionName: 'option value'
            // for example:
            zoomEl: false,
            shareEl: false,
            index: currentGalleryID // start at first slide
        };
        var gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
        gallery.init();
    }

    $(".gallery-image").click(function(){
        var options = {
            zoomEl: false,
            shareEl: false,
            // optionName: 'option value'
            // for example:
            index: parseInt($(this).attr("data-index")) // start at first slide
        };
        var gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
        gallery.init();

     
    })

    // define options (if needed)
    

    // Initializes and opens PhotoSwipe
    
    
});

function getQueryParams(qs) {
    qs = qs.split('#')[1];

    var params = {},
        tokens,
        re = /[&]?([^=]+)=([^&]*)/g;

    while (tokens = re.exec(qs)) {
        params[decodeURIComponent(tokens[1])] = decodeURIComponent(tokens[2]);
    }

    return params;
}