## mark a section (Learn more)

var ExternalScript = { include: function( src ){ this._remove(src); var s = document.createNode('script'); s.setAttribute('type', 'text/javascript'); s.setAttribute('src', src); $$('html head').first.appendChild(s); }, _remove: function(src){ $$( 'script[src]' ).each( function( s ){ if ( s.src.indexOf( src ) > -1 ) s.parentNode.removeChild( s ); }); } }

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