$(‘some_element’).addClass(‘some-class’);</p> <p>// You can add more than one class at one time<br /> $(‘some_element’).addClass(‘some-class another-class yet-another-class’);</p> <p>// Even thought jQuery allows you to do this<br /> $(‘some_element’).addClass(‘some-class’).addClass(‘another-class’).addClass(‘yet-another-class’);</p> <p>// That would be really wasteful, think of the planet!<br /> // But more importantly, your RAM<br /> // oh and those poor folks who be viewing your website

$(“#elem”).addClass(“classname”);

$( “p” ).addClass( “selected highlight” );

$( “p” ).addClass( “myClass yourClass” );<br />

$( “p” ).removeClass( “myClass noClass” ).addClass( “yourClass” );<br />

$(“#my_id”).attr(“class”, “my_new_class_name”);

//On button cick<br /> <script><br /> $(document).ready(function(){<br /> $(“button”).click(function(){<br /> $(“p:first”).addClass(“intro”);<br /> });<br /> });<br /> </script></p> <p>//On page load<br /> <script><br /> $(document).ready(function(){<br /> if ($( “#element” ).hasClass(‘className’)) {<br /> $( “#element” ).removeClass( ‘className’);<br /> } else {<br /> $( “#element” ).addClass( ‘className’);<br /> }<br /> });<br /> </script>

$( “p” ).addClass( “myClass yourClass” );<br />

$(‘#element’).addClass(‘active’);

$(‘body’).addClass(newClass);<br />