function loadJS(file){ document.write('<script type="text/javascript" src="'+ file + '"></script' + '>'); }

loadJS("http://connect.facebook.net/en_US/all.js#xfbml=1");
loadJS("//platform.twitter.com/widgets.js");
loadJS("//platform.linkedin.com/in.js");
loadJS("//apis.google.com/js/plusone.js");

gapi.plus.go();