Create or rename the icon you want to favicon.ico and copy it to the root directory of your website. The brwoser will look for this icon as it loads the page.
use this method is case you don't have access to the root of your website.
add the follwoing ocde between the head section:
LINK REL="SHORTCUT ICON"
also you can use this method to assign an icon to every page "Having unique name for each one"
\"The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards - and even then I have my doubts\".....Spaf Everytime I learn a new thing, I discover how ignorant I am.- ... Black Cluster