jQuery

When you create a javascript file, you may want to make sure you can use jQuery. To avoid having it twice and maybe introducing incompatibilities, just add this at the beginning of the javascript file: if (typeof jQuery == ‘undefined’) { var script = document.createElement(‘script’); script.src = ‘http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js’; script.type = ‘text/javascript’; document.getElementsByTagName(‘head’)[0].appendChild(script); }

A small script to count the number of words and/or characters in an input or textarea field <input id=”text” name=”text” type=”text” /> <span id=”count”></span> We place the script in jQuery’s ready function to make sure the HTML has been fully loaded. $(document).ready(function() { count($(“#text”), $(“#count”)); $(“#text”).keyup(function() { count($(“#text”), $(“#count”)); }); }); function count(src, dest) { … Read more

To retrieve the value of the selected button: $(‘input[name=radioName]:checked’, ‘#myForm’).val()

jQuery-File-Upload How to use the basic solution from jQuery-File-Upload and make it work on every browser, with a special dedication to Internet Explorer. The basic version has the advantage of not being overloaded with libraries, and above all it is much easier to import into a site that already exists. Libraries <script type=”text/javascript” src=”//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js”></script><script type=”text/javascript” … Read more

To focus the first field on your page, just use: $(“input:text:visible:first”).focus();