similar to igoogle ??

hello
i want to use "draggable" interaction and show/hide effect in my
website..
when the user drags or hides a div block, i want to save the new
settings (position of block, visible or hidden setting) for each
block.. so, when the user logs in again to my site, his preferences
should be used..
i know basics of html javascript, php, and mysql..
pls help me
thank you