A link will be created seperately that activates the javascript to randomly load a post page from the blog archive.
Creating the Javascript
Step 1: In your blogger, goto Design > Page Elements.
Step 2: Add a gadget.
Step 3: Select HTML/Javascript.
Step 4: Copy and paste the code below to the gadget content.
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<script type='text/javascript'>
//<![CDATA[
function showLucky(root){
var feed = root.feed;
var entries = feed.entry || [];
var entry = feed.entry[0];
for (var j = 0; j < entry.link.length; ++j) {
if (entry.link[j].rel == "alternate") {
window.location = entry.link[j].href;
}
}
}
function fetchLuck(luck){
script = document.createElement('script');
script.src = '/feeds/posts/summary?start-index='+luck+'&max-results=1&alt=json-in-script&callback=showLucky';
script.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(script);
}
function readLucky(root){
var feed = root.feed;
var total = parseInt(feed.openSearch$totalResults.$t,10);
var luckyNumber = Math.floor(Math.random()*total);
luckyNumber++;
fetchLuck(luckyNumber);
}
function feelingLucky(){
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = '/feeds/posts/summary?max-results=0&alt=json-in-script&callback=readLucky';
document.getElementsByTagName('head')[0].appendChild(script);
}
//]]>
</script>
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Step 5: Save the gadget without a Title name for the gadget.
The Link Code
Step 6: Use the link code in your blog as a widget/gadget or insert it into your blog template. That's depends on how you want it to be.
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<a href="#random" onclick="feelingLucky()" title="Random Post">Feeling Lucky?</a>
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References/Credits:
http://almost-a-technocrat.blogspot.co.id/2010/08/create-random-post-link-in-blogger.html
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