css width: calc(100% -100px); alternative using jquery
Solution 1:
If you have a browser that doesn't support the calc expression, it's not hard to mimic with jQuery:
$('#yourEl').css('width', '100%').css('width', '-=100px');
It's much easier to let jQuery handle the relative calculation than doing it yourself.
Solution 2:
I think this may be another way
var width= $('#elm').width();
$('#element').css({ 'width': 'calc(100% - ' + width+ 'px)' });