<script>
$(document).ready(function() {
$('.full-desc').ShortText({
  height: '200',
  text: 'Больше'
});
});

jQuery.fn.ShortText = function(e) {
var e = jQuery.extend({
  height: "200",
  text: "Plus"
}, e);
return this.each(function() {
  var i = $(this),
  t = i.height();
  t > e.height && i.addClass("full-desc text-less").height(e.height).after('<div class="show-more"><span>' + e.text + "</span></div>"), $(".show-more span").click(function() {
  var i = $(this),
  s = $(this).parent().prev(".full-desc");
  ah = parseInt(s.css("height"), 10), ah == t ? s.css({
  height: e.height
  }) : s.css({
  height: t
  }), i.text(i.text() == e.text ? "Moins" : e.text), s.toggleClass("text-less")
  })
})
};
</script>