I happened to stumbled upon this website http://www.tristarwebdesign.co.uk/ whereby on the (near) top-left corner, the option of user being able to select text caught my attention. This could help the viewers of my website to select the tex-size they feel comfortable with.
However, from the above website, you can see that the user can select the font-size STRAIGHT-AWAY by simply "choosing" (rather than continuously clicking) the font-size they desire.
You can see from this site: http://members.lycos.co.uk/darsh25/Personal%20Website/services.php that although, I've achieved the desired look but not the function as yet (top-left corner). Text file of "services.php" i.e. the coding can be seen from http://members.lycos.co.uk/darsh25/Personal%20Website/services.php.txt
My other related documents (like stylesheet & "inc" file, etc.) can be seen on: