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(function(jqueryUrl, callback) {
if (typeof jqueryUrl != 'string') {
jqueryUrl = 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js';
}
if (typeof jQuery == 'undefined') {
var script = document.createElement('script');
var head = document.getElementsByTagName('head')[0];
var done = false;
script.onload = script.onreadystatechange = (function() {
if (!done && (!this.readyState || this.readyState == 'loaded'
|| this.readyState == 'complete')) {
done = true;
script.onload = script.onreadystatechange = null;
head.removeChild(script);
callback();
}
});
script.src = jqueryUrl;
head.appendChild(script);
}
else {
callback();
}
})(false, callback);
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