var pass = 72;
var content = 'UP!';
var currentDate = new Date();
var spans = document.getElementsByTagName('span');
for (i = 0; i < spans.length; i++) {
if(spans[i].getAttribute('class') == 'up' ||
spans[i].getAttribute('className') == 'up') {
time = spans[i].childNodes[0].nodeValue.split(":");
var EntryModifiedDate = new Date(time[0], time[1]-1, time[2], time[3], time[4], time[5]);
var now = (EntryModifiedDate.getTime() - currentDate.getTime())/(60*60*1000);
now = Math.ceil(now);
if(-now <= pass){
spans[i].innerHTML = content;
spans[i].style.display = 'inline';
}
}
}