function ages(str){
var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if(r==null)return false;
var d= new Date(r[1], r[3]-1, r[4]);
if(d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4])
{
var Y = new Date().getFullYear();
// return ("年龄 = "+ (Y-r[1]) +" 周岁");
return ((Y-r[1]));
}
return("输入的日期格式错误！");
}
ages("1992-12-15")