jquery - setting image visible area in css -

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i using jcarousel make image slider of logos. in image should not used background should in image tag, thats requirement. placed images in li tag. , jcarousel working fine.

but here have show half of picture(sprite image [default,mouse on image]) default , on mouse on part. in css how set image position show half of picture , on mouse on half.

see screenshot.

enter image description here

thanks

first, make sure li elements set overflow: hidden.
then, move img's left, outside of li elements: 

var neg_width_of_individual_img = -35; //may need change number!  $(document).ready(function(){   $('#slideshow img').hover(     function(){       $(this).css('margin-left',neg_width_of_individual_img);     },     function () {       $(this).css('margin-left',0);     }   ); });

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