//传入年龄、年龄类型，返回出生日期

Date.prototype.DateAdd = function (strInterval, Number) {var dtTmp = this;switch (strInterval) {case 's': return new Date(Date.parse(dtTmp) + (1000 * Number));case 'n': return new Date(Date.parse(dtTmp) + (60000 * Number));case 'h': return new Date(Date.parse(dtTmp) + (3600000 * Number));case 'd': return new Date(Date.parse(dtTmp) + (86400000 * Number));case 'w': return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));case 'q': return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());case 'm': return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());case 'y': return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());}
}
/* 计算两日期相差的日期年月日等 */
Date.prototype.DateDiff = function (strInterval, dtEnd) {var dtStart = this;if (typeof dtEnd == 'string')//如果是字符串转换为日期型  {dtEnd = StringToDate(dtEnd);}switch