title: jQuery UI slider - doesn't work on IE if developer tools isn't activated
body: <p>I have a really strange problem. 
  I'm using jQuery 1.7.1 and UI 1.8.17 for a slider. </p>
  
  <p>It works like charm on Chrome, Safari and FF (as long as you don't oben firebug...).
  So far so good, BUT!</p>
  
  <p>It doesn't work on IE (tested with IE 8 &amp; 9). However, as soon as you open the IE developer tools, the slider works! </p>
  
  <p>I have absolutly no idea how to fix that... so hopefully anyone of you guys can help me out! </p>
  
  <p>My JS-Code:</p>
  
  <pre><code>$(document).ready(function(){
  $("#content-slider").slider({
          animate: true,
          value: 0,
          slide: handleSliderSlide,
          change:handleSliderChange
        });   
  
  var c = parseInt($(".content-item").length);
  var isiPad = navigator.userAgent.match(/iPad/i) != null;
  //var w = eval((376 * c) + 1);
  if ($.browser.msie &amp;&amp; parseInt($.browser.version)==9 || isiPad) {
      var w = parseInt(eval(376.5 * c));
  }
  else {
      var w = eval(376.5 * c);
  }
  
  var s = $(window).width();
  
  
  $("#content-scroll").attr('style', 'width:'+s+'px;');
  $("#content-holder").attr('style','width:'+w+'px;');
  
  
  if(isiPad){
          $("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:3px;');
      }
      else if($.browser.msie) {
          switch (parseInt($.browser.version)) {
              case 9:
                  $("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:2px;');
                  break;
              case 8:    
                  $("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:2px;');
                  break;
              case 7:    
                  $("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:2px;');
                  break;    
          }
  
      }
      else if ($.browser.safari) {
          $("#content-slider").attr('style', 'width:'+eval(s - 48)+'px;margin-left:3px;');
      } 
      else{
          $("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:2px;');
          //$("#content-slider").attr('style', 'width:'+eval(s - 49)+'px;margin-left:2px;');
      }
  
      $("a.fancybox").fancybox();
  
      $('#lnkproject').addClass('current');
          $('#lnkproject').click(function(){
              console.log('lnkproject.click');
              $('#lnkproject').addClass('current');
              $('#lnkskills').removeClass('current');
              $('#lnkcontact').removeClass('current');
  
              $("#content-slider").slider({
                  animate: true,
                  value: 0,
                  slide: handleSliderSlide,
                  change: handleSliderChange
  
              });
          });
  
  
      $('#lnkskills a').click(function(){
          console.log('lnkskills.click');
          $('#lnkproject').removeClass('current');
          $('#lnkcontact').removeClass('current');
          $('#lnkskills').addClass('current');        
          scval = parseInt(($("#content-holder").width() - $("#content-scroll").width()) / 100);
          $("#content-slider").slider({
              animate: true,
              value: eval(scval + 1),
              slide: handleSliderSlide,
              change: handleSliderChange
          });
      });
  
      $('#lnkcontact').click(function(){
          console.log('lnkcontact.click');
          $('#lnkproject').removeClass('current');
          $('#lnkskills').removeClass('current');
          $('#lnkcontact').addClass('current');       
          $("#content-slider").slider({
              animate: true,
              value: 100,
              slide: handleSliderSlide,
              change: handleSliderChange
          });
      });
  
      $("#fp_prev_thumb").click(function() {
          console.log('fp_prev_thumb.click');
          var slideval = parseInt($('#content-slider').slider("option", "value"));
          $("#content-slider").slider({
              animate: true,
              value: slideval - 10,
              slide: handleSliderSlide,
              change: handleSliderChange
          }); 
      });
  
      $("#fp_next_thumb").click(function() {
          console.log('fp_next_thumb.click');
          var slideval = parseInt($('#content-slider').slider("value"));
          $("#content-slider").slider({
              animate: true,
              value: (slideval + 10),
              slide: handleSliderSlide,
              change: handleSliderChange
          });
  
  
      });
  
  function handleSliderChange(e, ui){
        console.log('handleSliderChange');
        var maxScroll = $("#content-holder").width() - $("#content-scroll").width();
        $("#content-scroll").animate({scrollLeft: ui.value * (maxScroll / 100) }, 200);
      }
  function handleSliderSlide(e, ui)
      {
      console.log('handleSliderSlide');   
        var maxScroll = $("#content-holder").width() - $("#content-scroll").width();
        $("#content-scroll").animate({scrollLeft: ui.value * (maxScroll / 100) }, 20);
      }});
  </code></pre>