Looks like it comes from squarespace? http://static.squarespace.com/universal/scripts-v6/01242013221044728/yui-seed.js http://static.squarespace.com/universal/

Looks like it comes from squarespace? http://static.squarespace.com/universal/scripts-v6/01242013221044728/yui-seed.js http://static.squarespace.com/universal/scripts-v6/012420132... is the thing that references it. Lines like a.all(".sqs-block.map-block[data-block-json]").each(function(e) { d.Squarespace.Rendering.renderMap(e.one(".sqs-block-content"), d.JSON.parse(e.getAttribute("data-block-json"))) }); inside the "var Squarespace = {load: function()" namespace.