Not to fear. You can easily create a show desktop shortcut and place it anywhere you'd like.
Open your favorite text editor and type the following code:
[Shell]Save the file as 'Show Desktop.scf' and make sure theat 'All Files' is selected in the File Type list. Save this file on your desktop, then drag it to the Quick Launch toolbar.
If you want to customize the icon and use your own Icon instead of using the Windows default, put the path of the icon next to 'IconFile=' as follows: