function changeText(){
  $("#about").text("<b>軽量/高速</b>なライブラリです");
}


$(function(){
  $("a.navi").hover(
    function(){
      this.style.color = "pink";
    },
    function(){
      this.style.color = "black";
    }
  );
});



$('selector').loupe({
  width: 300, // width of magnifier
  height: 225, // height of magnifier
  loupe: 'loupe' // css class for magnifier
});

<!--  initialize the slideshow when the DOM is ready -->
$(document).ready(function() {
  $('.slideshow').cycle({
    fx: 'fade' // choose your transition type, ex: fade, scrollUp, shuffle, etc...
  });
});