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Can javascript check jQuery and load it if it is not already present?

I'm just looking for simple javascript that can check if the jQuery library is loaded, and if not, it loads it.

Thanks in advance if you have a solution.

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3 answers
if (typeof jQuery == 'undefined') {  
    // jQuery is not loaded => load it:
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js';
    document.getElementsByTagName('body')[0].appendChild(script);
}
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Download the script from Javascript by adding the tag <script>:

var fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript")
fileref.setAttribute("src", filename)
document.getElementsByTagName("head")[0].appendChild(fileref)
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try it

if(typeof($) == 'undefined' || typeof(jQuery) == 'undefined'){//JQuery do not exist
    //Load the Jquery from your site or any CDN
}
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