Error in jquery using master page and css

Hi,

In my application iam using jquery and master page.i wrote css for jquery in master file.and it is working fine.

my problem is i want to write following css in master file

var pos = $(this).offset();
var width = $(this).width();

$("#disp").css({
left: (pos.left + width) + 'px',
top: pos.top - 5 + 'px'
});

how it is possible.in normal page we can write css in same page.

how to solve this

Regards

K L BAIJU