function DateStringFromNow(postdate){var second=1000;var minutes=second*60;var hours=minutes*60;var days=hours*24;var myDate=new Date(Date.parse(postdate));if (isNaN(myDate)){myDate=new Date(postdate.replace(/-/g,"/"));}var nowtime=new Date();var longtime=nowtime.getTime()-myDate.getTime();var showtime=0;if (longtime>days*7){}else if (longtime>days){document.write("("+Math.floor(longtime/days)+"天前)");}else if(longtime>hours){document.write("("+Math.floor(longtime/hours)+"小时前)");}else if(longtime>minutes){document.write("("+Math.floor(longtime/minutes)+"分钟前)");}else if(longtime>second){document.write("("+Math.floor(longtime/second)+"秒前)");}}