// passage time
var pass = 240;
 
// display content
var content = 'new';
var currentDate = new Date(); 
var dds = document.getElementsByTagName('dd');

for (i = 0; i < dds.length; i++) {
	var titleAttr = dds[i].getAttribute('class');
    if(titleAttr !== null && titleAttr !== '') {
        var time = titleAttr.split(":");
        var entryDate = new Date(time[0], time[1]-1, time[2], time[3], time[4], time[5]); 
        var now = (entryDate.getTime() - currentDate.getTime())/(60*60*1000); 
        now = Math.ceil(now);
        if(-now <= pass){
		    dds[i].className = content;
        }
    }
}