Just Follow Below Given Simple Steps :
Step 1 – First Login to your Facebook Account.
Step 2 – Now Go To This Site (http://smileyti.me/) and Like their Facebook Page.
Step 3 – Click on the Choose File Button and choose an image from your computer .
Step 4 – Click on the Upload Now button .
Step 5 – Now Click on Show Codes and Paste the Code to Your Facebook Chat Box.
Thats It !