syntax jquery prototype=<jquery1.8

syntax jquery prototype=<jquery1.8

i search to convert this line in jquery langage


[CODE]
.setStyle( 'right:' + ( $('right_block').getWidth() + right + 19 ) + 'px;' );

[/CODE]

+ right is a variable
i have test with .css( 'right:' + ( $('right_block').width() + right + 19 ) + 'px;' ); but don't work