I don't want datatable's columns to resize so they can fit the div container

onica

http://live.datatables.net/qesafaja/1

Above is my link , u can see that i have set the columns to have 20px each. I need the columns to have the width that i have set them , and not adjust the width along with the container. I know i can set the table width to 20pxnr_columns and solve the problem , but the thing is that in my datatables each time i load a set of data the number of columns change . I olso need for the scroller to activate if the tables width(20pxnr_cols) > div container width, and have the first column fixed