js判断身份证号

var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",  
            21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",  
            33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",  
            42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",  
            51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",  
            63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"};
//身份证号合法性验证
		//支持15位和18位身份证号
		//支持地址编码、出生日期、校验位验证
		IdentityCodeValid:function(card)  
		{  
		    //是否为空  
		    if(card === '')  
		    {  
		        return false;  
		    }  
		    //校验长度，类型  
		    if(this.isCardNo(card) === false)  
		    {  
		        return false;  
		    }  
		    //检查省份  
		    if(this.checkProvince(card) === false)  
		    {   
		        return false;  
		    }  
		    //校验生日  
		    if(this.checkBirthday(card) === false)  
		    {  
		        return false;  
		    }  
		    //检验位的检测  
		    if(this.checkParity(card) === false)  
		    {  
		        return false;  
		    }   
		    return true;  
		},
		  
		  
		//检查号码是否符合规范，包括长度，类型  
		isCardNo:function(card)  
		{  
		    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X  
		    var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;  
		    if(reg.test(card) === false)  
		    {  
		        return false;  
		    }  
		  
		    return true;  
		}, 
		  
		//取身份证前两位,校验省份  
		checkProvince:function(card)  
		{  
		    var province = card.substr(0,2);  
		    if(vcity[province] == undefined)  
		    {  
		        return false;  
		    }  
		    return true;  
		},  
		  
		//检查生日是否正确  
		checkBirthday:function(card)  
		{  
		    var len = card.length;  
		    //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字  
		    if(len == '15')  
		    {  
		        var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;   
		        var arr_data = card.match(re_fifteen);  
		        var year = arr_data[2];  
		        var month = arr_data[3];  
		        var day = arr_data[4];  
		        var birthday = new Date('19'+year+'/'+month+'/'+day);  
		        return this.verifyBirthday('19'+year,month,day,birthday);  
		    }  
		    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X  
		    if(len == '18')  
		    {  
		        var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;  
		        var arr_data = card.match(re_eighteen);  
		        var year = arr_data[2];  
		        var month = arr_data[3];  
		        var day = arr_data[4];  
		        var birthday = new Date(year+'/'+month+'/'+day);  
		        return this.verifyBirthday(year,month,day,birthday);  
		    }  
		    return false;  
		},  
		  
		//校验日期  
		verifyBirthday:function(year,month,day,birthday)  
		{  
		    var now = new Date();  
		    var now_year = now.getFullYear();  
		    //年月日是否合理  
		    if(birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day)  
		    {  
		        //判断年份的范围（3岁到100岁之间)  
		        var time = now_year - year;  
		        if(time >= 3 && time <= 100)  
		        {  
		            return true;  
		        }  
		        return false;  
		    }  
		    return false;  
		},  
		  
		//校验位的检测  
		checkParity:function(card)  
		{  
		    //15位转18位  
		    card = this.changeFivteenToEighteen(card);  
		    var len = card.length;  
		    if(len == '18')  
		    {  
		        var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);   
		        var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');   
		        var cardTemp = 0, i, valnum;   
		        for(i = 0; i < 17; i ++)   
		        {   
		            cardTemp += card.substr(i, 1) * arrInt[i];   
		        }   
		        valnum = arrCh[cardTemp % 11];   
		        if (valnum == card.substr(17, 1))   
		        {  
		            return true;  
		        }  
		        return false;  
		    }  
		    return false;  
		},  
		  
		//15位转18位身份证号  
		changeFivteenToEighteen:function(card)  
		{  
		    if(card.length == '15')  
		    {  
		        var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);   
		        var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');   
		        var cardTemp = 0, i;     
		        card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6);  
		        for(i = 0; i < 17; i ++)   
		        {   
		            cardTemp += card.substr(i, 1) * arrInt[i];   
		        }   
		        card += arrCh[cardTemp % 11];   
		        return card;  
		    }  
		    return card;  
		},

多话不说直接上代码：