How to make a random post widget on blogspot

In addition to displaying the latest posts (recent post) we can also show a post at random (random post). If the latest posts show only the new posts in the post, then it can display a random post job postings and new posts at random, each page is loaded then the contents of posting random (random post) is always different so enlarge opportunities pageview blog.

Examples can be seen in the sidebar of this blog, namely Random Post

Here is a script to display a random post on blogspot, this script I get from the blog bloggerstop:

<script type="text/javascript">

var acakarray = new Array();var l=0;var flag;

var numofpost=5;function randomposts(json){

var total = parseInt(json.feed.openSearch$totalResults.$t,10);

for(i=0;i < numofpost;){flag=0;acakarray.length=numofpost;l=Math.floor(Math.random()*total);for(j in acakarray){if(l==acakarray[j]){ flag=1;}}

if(flag==0&&l!=0){acakarray[i++]=l;}}document.write('<ul>');

for(n in acakarray){ var p=acakarray[n];var entry=json.feed.entry[p-1];

for(k=0; k < entry.link.length; k++){if(entry.link[k].rel=='alternate'){var item = "<li>" + "<a href=" + entry.link[k].href + ">" + entry.title.$t + "</a> </li>";

document.write(item);}}

}document.write('</ul>');}

</script>

<script src="/feeds/posts/default?alt=json-in-script&start-index=1&max-results=1000&callback=randomposts" type="text/javascript"></script>

Note:
Number 5 on numofpost = 5 is the number of posts to be displayed at random, can be replaced with your needs.

Procedures you should do:
1. Login to blogger
Choose Layout, Page Elements, Add Gadget, select HTML / Javascript
Enter the above javascript code into a gadget HTML / Javascript