var list = Array();
var placeholder = Array ();
list = ["http://js-kit.com/comments-count.js","http://js-kit.com/ratings.js","http://s7.addthis.com/js/widget.php?v=10","/js/bronto.js"];
placeholder= ["#commentcount","#rating","#addthis1","#bronto"];
$(document).ready(function(){
    for (var i in list){
       if ($(placeholder[i]).length > 0) {
           $.getScript(list[i],function(){
            $(placeholder[i]);
           });
       }
    }
});