Помогите найти ошибку

Нужно реализовать слайдер в шаблоне. Нашёл вот такой и немного переделал под себя. http://www.brenelz.com/blog/build-a-content-slider-with-jquery/

в итоге почему-то он съезжает.

/*
 * Color, Border, and Button Rules
 */
.contentslider {
  top:10px; /* This acts as a border for the content slider */
  background:#; /* This is the color of said border */
}

.cs_leftBtn, .cs_rightBtn {
  width:30px; /* Should be as wide as the button graphic being used */
}

/*
 * Article styles (font, color, etc.)
 *
 * If textResize is set to TRUE, sizing shouldn't need to be touched. However,
 * depending on the sizes you have defined, additional tweaking may be
 * required in order to get the text to display properly.
 */
.cs_article h2 {
  font-size:200%;
  line-height:1.125em;
}
  .cs_article h2 a {
    color:#333;
    text-decoration:none;
  }
.cs_article p {
  font-size:85%;
  line-height:1.5em;
  color:#777;
}
.cs_article .readmore {
  font-size:80%;
}

/*
 ******************************************************************************
 * These styles may be affected by the plugin, so avoid changing them if 
 * it's not absolutely necessary.
 ******************************************************************************
 */
.contentslider {
  position:relative;
  display:block;
  width:900px;
  height:900px;
  margin:0 auto;
  overflow:hidden;
}
.cs_wrapper {
  position:relative;
  display:block;
  width:100%;
  height:100%;
  margin:0;
  padding:0;
  overflow:hidden;
}
.cs_slider {
  position:absolute;
  width:10000px;
  height:100%;
  margin:0;
  padding:0;
}
.cs_article {
  float:left;
  position:relative;
  top:0;
  left:0;
  display:block;
  width:900px;
  height:700px;
  margin:0 auto;
  padding:0;
}
.cs_article h2 {
  display:block;
  width:26%;
  margin:10px 6px 5px 5%;
  text-align:left;
}
.cs_article img {
  position:absolute;
  top:0;
  margin-left: 320px;
  width:66%;
  border:0;
  -ms-interpolation-mode:bicubic;
}
.cs_article p {
  display:block;
  width:26%;
  margin:0 26px 5px 5%;
  border:0;
}
.cs_article .readmore {
  display:block;
  width:26%;
  margin:0 6% 1% 68%;
  text-align:right;
}
.cs_leftBtn, .cs_rightBtn {
  position:absolute;
  top:0;
  height:400px;
  padding:110px 0;
  z-index:10000;
}
.cs_leftBtn {
  left:0;
  outline:0;
}
.cs_rightBtn {
  right:0;
  outline:0;
}
.cs_leftBtn img, .cs_rightBtn img {
  border:0;
  position:relative;
  top:200px;
  margin:0;
}

(function($) {
  $.fn.ContentSlider = function(options)
  {
    var defaults = {
      leftBtn : 'images/cs_leftImg.png',
      rightBtn : 'images/cs_rightImg.png',
      width : '100px',
      height : '700px',
      speed : 700,
      easing : 'easeOutQuad',
      textResize : false,
      IE_h2 : '26px',
      IE_p : '11px'
    }
    var defaultWidth = defaults.width;
    var o = $.extend(defaults, options);
    var w = parseInt(o.width);
    var n = this.children('.cs_wrapper').children('.cs_slider').children('.cs_article').length;
    var x = -1*w*n+w; // Minimum left value
    var p = parseInt(o.width)/parseInt(defaultWidth);
    var thisInstance = this.attr('id');
    var inuse = false; // Prevents colliding animations

    function moveSlider(d, b)
    {
      var l = parseInt(b.siblings('.cs_wrapper').children('.cs_slider').css('left'));
      if(isNaN(l)) {
        var l = 0;
      }
      var m = (d=='left') ? l-w : l+w;
      if(m<=0&&m>=x) {
        b
          .siblings('.cs_wrapper')
            .children('.cs_slider')
              .animate({ 'left':m+'px' }, o.speed, o.easing, function() {
                inuse=false;
              });

        if(b.attr('class')=='cs_leftBtn') {
          var thisBtn = $('#'+thisInstance+' .cs_leftBtn');
          var otherBtn = $('#'+thisInstance+' .cs_rightBtn');
        } else {
          var thisBtn = $('#'+thisInstance+' .cs_rightBtn');
          var otherBtn = $('#'+thisInstance+' .cs_leftBtn');
        }
        if(m==0||m==x) {
          thisBtn.animate({ 'opacity':'0' }, o.speed, o.easing, function() { thisBtn.hide(); });
        }
        if(otherBtn.css('opacity')=='0') {
          otherBtn.show().animate({ 'opacity':'1' }, { duration:o.speed, easing:o.easing });
        }
      }
    }



    return this.each(function() {
      $(this)
        // Set the width and height of the div to the defined size
        .css({
          width:o.width,
          height:o.height
        })
        // Add the buttons to move left and right
        .prepend('<a href="#" class="cs_leftBtn"><img src="'+o.leftBtn+'" /></a>')
        .append('<a href="#" class="cs_rightBtn"><img src="'+o.rightBtn+'" /></a>')
        // Dig down to the article div elements
        .find('.cs_article')
          // Set the width and height of the div to the defined size
          .css({
            width:o.width,
            height:o.height
          })
          .end()
        // Animate the entrance of the buttons
        .find('.cs_leftBtn')
         
        .find('.cs_rightBtn')
          .hide()
          .animate({ 'width':'show' });

      // Resize the font to match the bounding box
      if(o.textResize===true) {
        var h2FontSize = $(this).find('h2').css('font-size');
        var pFontSize = $(this).find('p').css('font-size');
        $.each(jQuery.browser, function(i) {
          if($.browser.msie) {
             h2FontSize = o.IE_h2;
             pFontSize = o.IE_p;
          }
        });
        $(this).find('h2').css({ 'font-size' : parseFloat(h2FontSize)*p+'px', 'margin-left' : '66%' });
        $(this).find('p').css({ 'font-size' : parseFloat(pFontSize)*p+'px', 'margin-left' : '66%' });
        $(this).find('.readmore').css({ 'font-size' : parseFloat(pFontSize)*p+'px', 'margin-left' : '66%' });
      }

      // Store a copy of the button in a variable to pass to moveSlider()
      var leftBtn = $(this).children('.cs_leftBtn');
      leftBtn.bind('click', function() {
        if(inuse===false) {
          inuse = true;
          moveSlider('right', leftBtn);
        }
        return false; // Keep the link from firing
      });

      // Store a copy of the button in a variable to pass to moveSlider()
      var rightBtn = $(this).children('.cs_rightBtn');
      rightBtn.bind('click', function() {
        if(inuse===false) {
          inuse=true;
          moveSlider('left', rightBtn);
        }
        return false; // Keep the link from firing
      });

      vCenterBtns($(this)); // This is a CSS fix function.
    });
  }
})(jQuery)

---------- Добавлено 22.10.2013 в 21:58 ----------

Сам нашёл. неправильно подогнал размеры.