As mentioned by Seeker, the problem could have been that you setup the click() function too soon. From your code snippet, we cannot know where you placed the script and whether it gets run at the right time.
An important point is to run such scripts after the document is ready. This is done by placing the click() initialization within that other function as in:
jQuery(document).ready(function()
{
jQuery("body").click(function()
{
// ... your click code here ...
});
});
This is usually the best method, especially if you include your JavaScript code in your <head> tag. If you include it at the very bottom of the page, then the ready() function is less important, but it may still be useful.