jQuery根据出生年月日得到年龄实现代码

本文主要和大家分享jquery 根据出生年月日得到年龄，希望能帮助到大家。

jquery 根据出生年月日得到年龄

function byage(strBirthday ){
		   var returnAge;  
		    var strBirthdayArr=strBirthday.split("-");  
		    var birthYear = strBirthdayArr[0];  
		    var birthMonth = strBirthdayArr[1];  
		    var birthDay = strBirthdayArr[2];  
		      
		    d = new Date();  
		    var nowYear = d.getFullYear();  
		    var nowMonth = d.getMonth() + 1;  
		    var nowDay = d.getDate();  
		      
		    if(nowYear == birthYear){  
		        returnAge = 0;//同年 则为0岁  
		    }  
		    else{  
		        var ageDiff = nowYear - birthYear ; //年之差  
		        if(ageDiff > 0){  
		            if(nowMonth == birthMonth) {  
		                var dayDiff = nowDay - birthDay;//日之差  
		                if(dayDiff < 0)  
		                {  
		                    returnAge = ageDiff - 1;  
		                }  
		                else  
		                {  
		                    returnAge = ageDiff ;  
		                }  
		            }  
		            else  
		            {  
		                var monthDiff = nowMonth - birthMonth;//月之差  
		                if(monthDiff < 0)  
		                {  
		                    returnAge = ageDiff - 1;  
		                }  
		                else  
		                {  
		                    returnAge = ageDiff ;  
		                }  
		            }  
		        }  
		        else  
		        {  
		            returnAge = -1;//返回-1 表示出生日期输入错误 晚于今天  
		        }  
		    }  
		      
		    return returnAge;//返回周岁年龄
	}