/* * 根据出生日计算年龄*/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((Y-r[1]));       }       return("输入的日期格式错误！");   }   console.log(ages("1993-12-18"));   console.log(ages("2002-01-41"));