var now=new Date()
var hour=now.getHours()
var ampm
now=null
if(hour>12)
{ hour-=12
ampm="下午" }
else
ampm="上午"hour=(hour==0)?12:hour
var hour=now.getHours()
var ampm
now=null
if(hour>12)
{ hour-=12
ampm="下午" }
else
ampm="上午"hour=(hour==0)?12:hour
var hour=now.getHours()
var ampm
now=null
if(hour>12)
{ hour-=12
ampm="下午" }
else
ampm="上午"忽略12点[if(hour>12)],就可以不要hour=(hour==0)?12:hour了