storing data in datatable on client side

Question

Hi! I am new to asp .net. I have to urgently develop some code. What I have to do is to develop an application which displays information like name, age, etc on a datagrid on the same page, when the user clicks on the save button. In this way I have to take 10 entries from the user & display them on the datagrid. My problem is that I am not supposed to access any database. What I have to do is to store this information on the client side itself. For this purpose, I have created a datatable. But when I click on the save button, the previously entered information is erased. This means that at any time my datagrid is effectively displaying only one row. Can any one please help me out? Any suggestions will be highly appreciated. Thanx.