Basic - Recent Posts with Summary

Unlike others, summary is used as feed parameter instead of default. Because entry.summary.$t cannot work if there isn't jump-break in post and it will show all post content. There is other problem about this. Probably it's about html tags, An unbalanced tree was written using document.write() causing data from the network to be reparsed for firefox 4+ Maybe we can solve this problem with a function like removeHTMLtag.

<script>
var numposts = 4;
var isList = true;

function removeHtmlTag(summary,len_summary){
    if(summary.indexOf("<")!=-1)
    {
        var s = summary.split("<");
        for(var i=0;i<s.length;i++){
            if(s[i].indexOf(">")!=-1){
                s[i] = s[i].substring(s[i].indexOf(">")+1,s[i].length);
            }
        }
        summary = s.join("");
    }
    len_summary = (len_summary < summary.length-1) ? len_summary : summary.length-2;
    while(summary.charAt(len_summary-1)!=' ' && summary.indexOf(' ',len_summary)!=-1) len_summary++;
    summary = summary.substring(0,len_summary-1);
    return summary+'...';
}

function showrecentposts(json) {
    for (var i = 0; i < 4; i++) {
        var entry = json.feed.entry[i];
        var postTitle = entry.title.$t;
        var postSummary = entry.summary.$t;
        
        postSummary = removeHtmlTag(postSummary, 300);
        
        var postUrl;
        
        if (i == json.feed.entry.length) break;
        for (var k = 0; k < entry.link.length; k++) {
            if (entry.link[k].rel == "alternate") {
                postUrl = entry.link[k].href;
                break;
            }
        }
        postTitle = postTitle.link(postUrl);
        if (isList) document.write("<li>");
        document.write(postTitle + postSummary);
    }
    if (isList) document.write("</li>");
}

</script>

<ul>
<script src="//btdocumentation.blogspot.com/feeds/posts/summary?max-results=900&amp;alt=json-in-script&amp;callback=showrecentposts">
</script>
</ul>