title: Determine if an element has a CSS class with jQuery
body: <p>I'm working with jQuery and looking to see if there is an easy way to determine if the element has a specific CSS class associated with it.</p>
  
  <p>I have the id of the element, and the CSS class that I'm looking for.  I just need to be able to, in an if statement, do a comparison based on the existence of that class on the element.</p>