<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="header">
	ヘッダー
</div>
<div id="contents">
  <a href="#page-link">リンク</a>
	<div id="page-link">
    <div class="box">コンテンツ部分</div>
	</div>
</div>

/* リセット */
*{
  padding:0;
  margin:0;
}

/* 今回の指定 */
#header {
	width: 100%;
	height: 30px;
	position: fixed;
	left:0;
	top:0;
	z-index: 10;
	background:#ccc;
  padding:10px;
}
#contents {
	padding-top: 50px;
}
#contents a{
  display:block;
  background:#fff;
  color:#333;
  padding:10px;
}
#page-link .box{
  height:500px;
  background:#333;
  color:#fff;
  padding:10px;
}
$(function () {
 var headerHight = 50; //ヘッダの高さ
 $('a[href^=#]').click(function(){
     var href= $(this).attr("href");
       var target = $(href == "#" || href == "" ? 'html' : href);
        var position = target.offset().top-headerHight;
     $("html, body").animate({scrollTop:position}, 550, "swing");
        return false;
   });
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.