新旧身份证合法性验证及相互转换算法(二)：JavaScript身份证号码验证-支持新的带x身份证

highping · 发表于 2013-2-7 20:08:54

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>身份证号码验证-支持新的带x身份证</title><script language="javascript">//身份证号码验证-支持新的带x身份证//function check_ID_card() {var ID_card = document.all('idcard').value;var IDcardLen = ID_card.length; var fMod = 11; //身份证算法求模关键值var oldIDLen = 15; //旧身份证长度 var newIDLen = 18; //新身份证长度var yearFlag = "19"; //新身份证年份标志 var Wi = new Array(); //位权值数组var varArray = new Array();var birthday = ''; //生日var checkDigit = ''; //校验位var numSum = 0; //数字和var regStr = /^\d{15,17}([\dxX]{1})?$/;if ((IDcardLen != 15) && (IDcardLen != 18)) {alert("身份证长度必须为15或18位.");return false;}if(!regStr.test(ID_card)){alert("身份证号码必须为数字(18位的新身份证最后一位可以是x).");return false;}if(IDcardLen == 15){birthday = "19" + ID_card.substring(6,8) + "-" + ID_card.substring(8,10) + "-" + ID_card.substring(10,12);}else{birthday = ID_card.substring(6,10) + "-" + ID_card.substring(10,12) + "-" + ID_card.substring(12,14);}if(!isDate(birthday)){alert("身份证号码中的日期格式不对(第6-12位).");return false;}if(IDcardLen == 18){for(var i=0;i<newIDLen-1;i++){ var k = Math.pow(2,newIDLen-1-i); Wi[i] = k % 11; } for(var i=0;i<IDcardLen-1;i++){varArray[i] = ID_card.charAt(i);varArray[i] = varArray[i]*Wi[i];numSum = numSum + varArray[i];}checkDigit = 12 - numSum % 11; switch (checkDigit) { case 10: checkDigit = 'X'; break; case 11: checkDigit = 0; break; case 12: checkDigit = 1; break; } // check last digit if (ID_card.charAt(17).toUpperCase() != checkDigit) { alert("身份证最后一位校验码不对，应该为"+checkDigit+"."); return false; }}alert(ID_card+"为正确的身份证号码.");return true;}//日期格式验证(yyyy-mm-dd,其中月，日可以只有一位）//function isDate(dateStr){var B, D=0;// Split into $1 $2 $3B = /^(\d{4})-(\d|\d\d)-(\d|\d\d)$/.test(dateStr); if (B) with (RegExp){ // $1 $2 $3 = Y M D D = new Date($1, $2-1, $3); // test Y M D valid B = ((D.getMonth()==$2-1) && (D.getFullYear()==$1)); }return B;}</script></head><body><form name='frm' ><center>身份证号码：<input type='text' name='idcard' value="">&nbsp;&nbsp; <input type=submit value='验证'></center></form></body></html>

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