I use the following code to determine whether a new version can be used.

$.support.cors = true;
$.ajax({
  url: 'http://code.jquery.com/jquery-{version}.js',
  type: 'GET',
  async: false
});

But produced a BUG： "NetworkError: 405 Not Allowed - ​http://code.jquery.com/jquery-2.1.1.js" jquery-2.1.1.js NS_ERROR_FAILURE jQuery requires a window with a document

jquery: 1.4.2 jquery-tmpl : github 1.0.0pre

$(function() {

$.getJSON('PInfo.aspx?' + genP('no,flds', getUrl()), {}, function(json) {

render_detail(json );

});

});

function render_detail(json) {

$.get('tmp-product-detail.htm', function(template) {

$(template).tmpl(json).appendTo('#contentShopItem');

});

}

example:<input type="text" name="tlinePrice.cprcitem" />
jquery:$('name=tlinePrice.cprcitem').val();
error in fireFox:uncaught exception: Syntax error, unrecognized expression: [name=tlinePrice.cprcitem]