js 精确验证身份证（地址编码、出生日期、校验位验证）

//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 ???????function IdentityCodeValid(code) { ????????????var city={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 "}; ???????????var tip = ""; ???????????var pass= true; ???????????//验证身份证格式（6个地区编码，8位出生日期，3位顺序号，1位校验位） ???????????if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[12])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)){ ???????????????tip = "身份证号格式错误"; ???????????????pass = false; ???????????} ??????????????????????else if(!city[code.substr(0,2)]){ ???????????????tip = "地址编码错误"; ???????????????pass = false; ???????????} ???????????else{ ???????????????//18位身份证需要验证最后一位校验位 ???????????????if(code.length == 18){ ???????????????????code = code.split(‘‘); ???????????????????//∑(ai×Wi)(mod 11) ???????????????????//加权因子 ???????????????????var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ]; ???????????????????//校验位 ???????????????????var parity = [ 1, 0, ‘X‘, 9, 8, 7, 6, 5, 4, 3, 2 ]; ???????????????????var sum = 0; ???????????????????var ai = 0; ???????????????????var wi = 0; ???????????????????for (var i = 0; i < 17; i++) ???????????????????{ ???????????????????????ai = code[i]; ???????????????????????wi = factor[i]; ???????????????????????sum += ai * wi; ???????????????????} ???????????????????var last = parity[sum % 11]; ???????????????????if(parity[sum % 11] != code[17]){ ???????????????????????tip = "校验位错误"; ???????????????????????pass =false; ???????????????????} ???????????????} ???????????} ???????????if(!pass) alert(tip); ???????????return pass; ???????}