Changing the grid CSS

Well, most of you guys might have known this, I am just putting it in for my reference.

Problem: If my application uses multiple grids and i want to have different CSS for each of the grids. What should i do?

Solution: 1) Set the Id of the grid.

grid.setId("myGrid");

2) Lets say I want to change the cell height and add borders to the cell of the above grid, I can change it by changing the css for that particular grid.

#myGrid .x-grid3-cell-inner 
{
    HEIGHT : 30px !important;  
    border: 1px solid #C0C0C0 !important;
}