Let me start by saying that I\'m not a power-JavaScript/jQuery programmer, I do very basic things with it, yet sometimes things get a little hairy for me, like this one.
You could find out the week of year to select the div:
(got the code from http://javascript.about.com/library/blweekyear.htm)
Date.prototype.getWeek = function() {
var onejan = new Date(this.getFullYear(),0,1);
return Math.ceil((((this - onejan) / 86400000) + onejan.getDay()+1)/7);
}
$(function(){
var today = new Date();
var weekno = today.getWeek();
$('#quotes-wrapper').load('/static-files/testimonials.html div.quote-'+weekno);
});