jQuery Grid Plugin - jqGrid

Hi

Could someone kindly let me know how I  can achive the below.

1. When I click on the add icon on the grid a form is open with all the fields that are editable, but when I click the submit button it requires an url to be set. I donot want to submit it to an url. I want the data to be added to the grid on the client itself instead of submitting it to an url. How can I achieve this ?

2.  Also, if there is a way to do the above how would I be able to get the newly added row as an array of new data added to the grid ?

3.  When I change a cell data it changes the cell to be dirty indicated by a red corner. How do I change the cells to their normal state at the client itself, since I donot want to submit it to the server as part of the cell save url, but instead I want to do some data manipulation at the client and submit it later as part of some webservice. But inthe mean time I want to have a way to clear the red colored indicated from the cells ?

Regards

Nirmal