var timedate= new Date("Mar 28,2010");
var now = new Date();    
var date = timedate.getTime() - now.getTime();
var time = Math.floor(date / (1000 * 60 * 60 * 24)+1);
if (time >= 0) document.write("<strong class='red'>"+time+"</strong>" +"日")
else if (time <=3)
document.write( "<strong class='red'>"+time+"</strong>" +"天")