text: $(window).scroll(function() {
   var x=$(window).scrollTop();
    if(x>323){
      $(".sobre").fadeIn(800);
    }else{
      $(".sobre").fadeOut(800);
    }
    if(x>400){
      $(".caracteristics").fadeIn(800);
    }else{
      $(".caracteristics").fadeOut(800);
    }
    if(x>900){
      $(".depoiment").fadeIn(800);
    }else{
      $(".depoiment").fadeOut(800);
    }
  });
  $(".front-paper").hover(function(){
    $(".legenda").fadeIn(300);
  });
  $("#bt1").mouseover(function(){
    $("#bt1").css("background-color","#ffcc66");
    $("#bt1").css("color","black");
    $("#bt1").css("border-color","#ffcc66");
    $("#bt1").mouseout(function(){
      $("#bt1").css("background-color","black");
      $("#bt1").css("color","#ffcc66");
    });
  });
  
  $("#bt2").mouseover(function(){
    $("#bt2").css("background-color","#ffcc66");
    $("#bt2").css("color","black");
    $("#bt2").css("border-color","#ffcc66");
    $("#bt2").mouseout(function(){
      $("#bt2").css("background-color","black");
      $("#bt2").css("color","#ffcc66");
    });
  });
  
  $("#bt3").mouseover(function(){
    $("#bt3").css("background-color","#ffcc66");
    $("#bt3").css("color","black");
    $("#bt3").css("border-color","#ffcc66");
    $("#bt3").mouseout(function(){
      $("#bt3").css("background-color","black");
      $("#bt3").css("color","#ffcc66");
    });
  });
  
  $("#bt4").mouseover(function(){
    $("#bt4").css("background-color","#ffcc66");
    $("#bt4").css("color","black");
    $("#bt4").css("border-color","#ffcc66");
    $("#bt4").mouseout(function(){
      $("#bt4").css("background-color","black");
      $("#bt4").css("color","#ffcc66");
    });
  });
  
  $("#bt1").click(function(){
    $("html, body").animate(
      { scrollTop: "0px" },1200
  );
  });
  
  $("#bt2").click(function(){
    $("html, body").animate(
      { scrollTop: "440px" },1200
  );
  });
  
  
  $("#bt3").click(function(){
    $("html, body").animate(
      { scrollTop: "920px" },1200
  );
  });
  
  $("#bt4").click(function(){
    $("html, body").animate(
      { scrollTop: "1220px" },1200
  );
  });