Different styles for different browsers

Hello

I'm using the joobb on joomla 1.5 it is working fine but the design has some differences between browsers (Firefox, IE) my default browser is IE and i want to add another one for Firefox. Can any one know how to do that?

Also the footer is not shown at my site i checked the paramerters from the back end and it is checked to yes but no footer. I want to display the seacrh link in footer, How can i do that?

Thanks.