light-slider.js

jQuery(function($){
    $('#bilan_temoignage_box .prev').click(function(e) {
        e.preventDefault();
      var sizes = $('.slides').css('left').replace('px', '');
      if(sizes == 0  || sizes == "auto") {
        $( ".slides" )
          .animate({ "left": "-840px" }, "slow" );
      } else {
        $( ".slides" )
          .animate({ "left": "+=210px" }, "slow" );
      }
    });
    $('#bilan_temoignage_box .next').click(function(e) {
        e.preventDefault();
      var sizec = $('.slides').css('left').replace('px', '');
      if(sizec == -840 || sizec == "auto") {
        $( ".slides" )
          .animate({ "left": "0px" }, "slow" );
      } else {
        $( ".slides" )
          .animate({ "left": "-=210px" }, "slow" );
      }
    });  
});