根据身份证号码推算出最后一位的正确性,如果不正确还会给出正确结果,非常有意思的一断程序。
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <html xmlns= "http://www.w3.org/1999/xhtml" > <head> <meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" /> <title>javascript 18位身份证号码最后一位校验码</title> </head> <body> <script> function getIDChar18(id) { var arr = id.split( '' ), sum = 0, vc = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]; for ( var i = 0; i < 17; i++) sum += vc[i] * parseInt(arr[i]); return [ '1' , '0' , 'X' , '9' , '8' , '7' , '6' , '5' , '4' , '3' , '2' ][sum % 11]; } function ValidID(id) { if (/^\d{18}$/.test(id)) { var c = id.charAt(17), rc = getIDChar18(id); if (c == rc) showRst( '您输入的18位身份证号码正确!<br>生日:' + id.substr(6, 8) + '<br>性别:' + [ '女' , '男' ][parseInt(id.charAt(16)) % 2]); else showRst( '您输入的18位身份证号码检验码错误,18位校验码应该为' + rc + '!' ); } else showRst( '请输入18位数字的身份证号码!' ); } function showRst(msg) {document.getElementById( 'rst' ).innerHTML=msg } </script> <input type= "text" onblur= "ValidID(this.value)" /> <div id= "rst" ></div> </body> </html> |