window.onload = function() {
    var date = new Date();
    var today = date.getDay();

    var weekdayImg = new Array(7);
    weekdayImg[0]="images/wrap/sunday.jpg";
    weekdayImg[1]="images/wrap/monday.jpg";
    weekdayImg[2]="images/wrap/tuesday.jpg";
    weekdayImg[3]="images/wrap/wednesday.jpg";
    weekdayImg[4]="images/wrap/thursday.jpg";
    weekdayImg[5]="images/wrap/friday.jpg";
    weekdayImg[6]="images/wrap/saturday.jpg";

    document.getElementById('thumbImg').src = weekdayImg[today];
}
// JavaScript Document