Bookmarklet to add jQuery to the current document

load_jquery_bookmarklet.js

javascript:(function(){
	if ('jQuery' in window) {
		console.log('jQuery '+jQuery.fn.jquery+' already present');
	}
	else {
		var s = document.createElement('script');
		s.src = 'http://code.jquery.com/jquery.min.js';
		s.onload = function() {
			console.log('jQuery '+jQuery.fn.jquery+' loaded.');
		};
		document.body.appendChild(s);
	}
}());