js验证身份证的有限,很准。
function checkCardId(socialNo){ if(socialNo == "") { alert("输入身份证号码不能为空!"); return (false); } if (socialNo.length != 15 && socialNo.length != 18) { alert("请输入有效证件号码!"); return (false); } var area={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"}; if(area[parseInt(socialNo.substr(0,2))]==null) { alert("身份证号码不正确(地区非法)!"); return (false); } if (socialNo.length == 15) { pattern= /^\d{15}$/; if (pattern.exec(socialNo)==null){alert("15位身份证号码必须为数字!");return (false); }var birth = parseInt("19" + socialNo.substr(6,2));var month = socialNo.substr(8,2);var day = parseInt(socialNo.substr(10,2));switch(month) {case '01':case '03':case '05':case '07':case '08':case '10':case '12':if(day>31) {alert('请输入有效证件号码!');return false;}break;case '04':case '06':case '09':case '11':if(day>30) {alert('请输入有效证件号码!');return false;}break;case '02':if((birth % 4 == 0 && birth % 100 != 0) || birth % 400 == 0) {if(day>29) {alert('请输入有效证件号码!');return false;}} else {if(day>28) {alert('请输入有效证件号码!');return false;}}break;default:alert('请输入有效证件号码!');return false;}var nowYear = new Date().getYear();if(nowYear - parseInt(birth)<15 || nowYear - parseInt(birth)>100) {alert('请输入有效证件号码!');return false;} return (true); } var Wi = new Array( 7,9,10,5,8,4,2,1,6, 3,7,9,10,5,8,4,2,1 ); var lSum = 0; var nNum = 0; var nCheckSum = 0; for (i = 0; i < 17; ++i) { if ( socialNo.charAt(i) < '0' || socialNo.charAt(i) > '9' ) { alert("请输入有效证件号码!"); return (false); } else { nNum = socialNo.charAt(i) - '0'; } lSum += nNum * Wi[i]; } if( socialNo.charAt(17) == 'X' || socialNo.charAt(17) == 'x') { lSum += 10*Wi[17]; } else if ( socialNo.charAt(17) < '0' || socialNo.charAt(17) > '9' ) { alert("请输入有效证件号码!"); return (false); } else { lSum += ( socialNo.charAt(17) - '0' ) * Wi[17]; } if ( (lSum % 11) == 1 ) { return true; } else { alert("请输入有效证件号码!"); return (false); }}