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hi, i have stumbled upon this site www.netvibes.com of course many of you know it. now i got 4 questions i hope some one would help me on it

-first is there is a small gray handle between the widgets column that let you re size the whole column and the widgets get re-sized upon that ?

-second is how you can create dropping zones like on that site ?

-third question is how do you save the position of those widgets for each client comeback ?

-fourth is how these widgets are loading all smoothly, i mean how to implement a loading image for each widget and best way to load them, webservice or update panel ?

thanks very much in advanced for any help.