How to save a work item with client side utility.

Hii,

I had a senariao that I need to get history of a work item and in that how many times the work item is moved to "Inprogress" state and based on that count I need to set an attribute value. These this I need to do by using Client side Plugin which means by running it as a jar. I got the history and count also now I need to know that when we set an attribute value we should need to save the work item know. I know how to set an attribute value and How to save the work item with server side Plugin but Now I need to know whether it is possible to do with client side utility. If possible kindly let me know how to set an attribute value and how to save the work item with client side Plugin.

Regards,

Pavan m.