var currentContent=0;
var maxContent=0;
var animateContent=true; //NEW

$(document).ready(function() {
  $(".hideme").css("display","none");
  
  $(".content").click(function() {
    nextContent();
  }).css("cursor","pointer");
  
  maxContent=$(".content").length;
  
  $(".counter").text(currentContent+1+"/"+maxContent);
});

function prevContent() {
  if(animateContent) { //NEW
    animateContent=false; //NEW
    $(".content:not('.hideme')").fadeOut(function() {
      $(this).addClass("hideme");
    
      currentContent--;
      if(currentContent<0)
        currentContent=maxContent-1;
        
      $(".counter").text(currentContent+1+"/"+maxContent);
      
      $(".content").eq(currentContent).removeClass("hideme").fadeIn(function() {
        animateContent=true; //NEW
      });
    });
  } //NEW
}

function nextContent() {
  if(animateContent) { //NEW
    animateContent=false; //NEW
    $(".content:not('.hideme')").fadeOut(function() {
      $(this).addClass("hideme");
    
      currentContent++;
      if(currentContent>=maxContent)
        currentContent=0;
      
      $(".counter").text(currentContent+1+"/"+maxContent);
      
      $(".content").eq(currentContent).removeClass("hideme").fadeIn(function() {
        animateContent=true; //NEW
      });
    });
  } //NEW
}