plugin.js

var pInfScrLoading = false;
var pInfScrDelay = 250;
function pInfScrExecute() {
	pInfScrNode = $('.more').last();	
	pInfScrURL = $('.more a').last().attr("href");
	if(pInfScrNode.length > 0 && pInfScrNode.css('display') != 'none') {
		$.ajax({
			type: 'GET',
			url: pInfScrURL,
			beforeSend: function() {
			  pInfScrLoading = true;
			  pInfScrNode.clone().empty().insertAfter(pInfScrNode).append('<img src=\"http://cdn.shopify.com/s/files/1/0068/2162/assets/loading.gif?105791\" />');
			  pInfScrNode.hide();
			},
			success: function(data) {
				// remove loading feedback
				pInfScrNode.next().remove();
				pInfScrNode.remove();
				var filteredData = $(data).find(".collection-matrix");
				// Saves reference to footer element
				var footer = $("#product-list-foot");
				// Removes any existing named anchor
				$('#last_content_page').remove();
				// Set hash part of window URL to 'last_content_page'
				// This is done here, while there is no matching named
				//   anchor, so that the scroll position of the page does
				//   not actually change
				window.location.hash = 'last_content_page';
				// Adds a new named anchor before new content
				$('<a name="last_content_page" id="last_content_page">').insertBefore( footer );					
				filteredData.insertBefore( footer );					
				pInfScrLoading = false;
				var link = $('li.singleproduct');
				link.setAllToMaxHeight();
				attachClickEvent(link);
			},
			dataType: "html"
		});

	}
}

function attachClickEvent(){
	(link || $('li.more a')).click(function(event){
		pInfScrExecute();
		event.stopPropagation();
		return false;
	});
}