Quick Tip: Accessing the Contents of a FCKEditor Box

Today I found myself needing a way to access the current contents of a FCKEditor instance on a web page via Javascript (I needed to create a "preview" dialog box that would show the user what the content would look like when published).  After some searching on Google, I learned that by instantiating FCKEditor on the page, I had access to the FCKEditor API and could access the content with the following statement:

var editorContent = FCKeditorAPI.GetInstance("postText").GetXHTML(true);

...where "postText" is the id value ("instanceName") of the editor.