$(function(){
$("#menu li:first").click(function(){
$(this).addClass("b");
});
$("#menu li:last").text(" The last ");//Insert the last li element in the li list with id menu into the text "last"
$("#menu li:first").text(" The first ");//Insert the text "first" into the first li element in the li list
$("#menu li:not(.on)").text("on");//Insert the text "on" into the li element in the li list whose style is not class="on"
$("#menu li:even").text(" An odd number of rows ");
$("#menu li:odd").text(" Even lines ");
});