_blog-footer.html

<!-- This is where you put the link to the archives. :-/ -->
(this is in _blog-footer.html)
<div id="blog_nav" style="display:none"></div>
<a href="/blog/archives.html">All blog posts</a> / <a href="">RSS</a>
<script lang="javascript">
   
  function addBlogNav(e){
    var myText = oReq.responseText.trim();

    var lines = myText.split("\n");
    var posts = new Array();

    var docPathName = document.location.pathname;
    if(docPathName.substring(0, 5) != '/blog' || docPathName == "/blog/archives.html"){
        return;
    }else{
        docPathName = docPathName.substring(6);
    }
    //console.log("path", docPathName);
    var postIndex = -1;
    var n = 0;
    for (line in lines){
        var text = lines[line];
        if(line % 2){
            posts[n][2] = text.trim();
            n += 1;
        }else{
            var a = text.split(' ');
            posts[n] = new Array(a[0],a[1],"");
            if(a[1] == docPathName){
                //console.log(n,a[1]);
                postIndex = n;
            }
        }
    }
    var nav_links = "";
    var youngerPostMarker = '&larr; ';
    var olderPostMarker = '&rarr; ';
    if(postIndex > -1){ 
        for(var i=0; i<posts.length; i++ ){
	    if(i == postIndex - 1){//to younger post
		// <span class="date">'+posts[i][0] +'</span> 
		nav_links +='<div class="index_item">'+youngerPostMarker+'<span class="title"><a href="/blog/'+posts[i][1]+'" title="'+posts[i][0] + ', ' + posts[i][2]+'">'+posts[i][2]+'</a></span></div>\n';
	    }
	    if(i == postIndex + 1){// to older post
		//<span class="date">'+posts[i][0] +'</span> 
		nav_links +='<div class="index_item">'+olderPostMarker+'<span class="title"><a href="/blog/'+posts[i][1]+'" title="'+posts[i][0] + ', ' + posts[i][2]+'">'+posts[i][2]+'</a></span></div>\n';
	    }
	}
	
	//console.log(nav_links);
	if(nav_links.length > 0){
            document.getElementById('blog_nav').innerHTML = nav_links;
            document.getElementById('blog_nav').style.display = "block";            
        }
    }else{
        //console.log("Post not found, not creating the nav");
    }
    }
    
    var docPathName = document.location.pathname;
    //console.log(docPathName);
    if(docPathName == '/blog/' || docPathName == "/blog/archives.html" || docPathName.substring(0, 5) != '/blog'){
    // blog index page, archive page or home page.
       document.getElementById('blog_end').style.display = "none";
    }else{
        docPathName = docPathName.substring(6);
        var oReq = new XMLHttpRequest();
        oReq.open("GET", '/blog/titles', true);
        oReq.onload = addBlogNav;
        oReq.send();
    }

</script>

(end of _blog-footer.html)