ID Card validation JavaScript implementation

Take to the grand, so the copyright belongs to Shanda Online all

Function nunber () { var idcard=document.getelementbyid (' U_nunber '). Value;  var errors= New array ("Verify through!", "ID card number is not correct!", "The date of birth is out of range or contains illegal characters!", "ID card number Error!", "Identity card area illegal!");  VAR AREA={11: "Beijing", 12: "Tianjin", 13: "Hebei", 14: "Shanxi", 15: "Inner Mongolia", 21: "Liaoning", 22: "Jilin", 23: "Heilongjiang", 31: "Shanghai", 32: "Jiangsu", 33: "Zhejiang" , 34: "Anhui", 35: "Fujian", 36: "Jiangxi", 37: "Shandong", 41: "Henan", 42: "Hubei", 43: "Hunan", 44: "Guangdong", 45: "Guangxi", 46: "Hainan", 50: "Chongqing", 51: "Sichuan", 52: "Guizhou", 53: " Yunnan ", 54:" Tibet ", 61:" Shaanxi ", 62:" Gansu ", 63:" Qinghai ", 64:" Ningxia ", 65:" Xinjiang ", 71:" Taiwan ", 81:" Hong Kong ", 82:" Macao ", 91:" Foreign "}   var  Idcard,y,jym;  var S,M;  var idcard_array = new array ();  idcardidcard_array = idcard.split ("");  if (Area[parseint (Idcard.substr (0,2))]==null)    { document.getelementbyid (' nunber_re '). Innerhtml= "<div class= ' re ' ><p class= ' tipserror ' ><img src= ' images/b.gif '   class= ' iconerror '  /> ' +errors[4]+ ' </p></div> ';  return false; &NBSP}   switch (IDCard.length) {    case 15:     if  (  parseint ( Idcard.substr (6,2)) +1900  % 4 == 0 | |   ((parseint (Idcard.substr (6,2)) +1900  % 100 == 0 &&  (parseint ( Idcard.substr (6,2)) (+1900)  % 4 == 0 )) {     ereg=/^[1-9][0-9] {5} [0-9] {2} ((01|03|05|07|08|10|12) (0[1-9]|[ 1-2][0-9]|3[0-1]) | (04|06|09|11) (0[1-9]| [1-2] [0-9]|30) |02 (0[1-9]|[ 1-2][0-9]) [0-9]{3}$/;     } else {     ereg=/^[1-9][0-9]{5}[0-9]{2} (01|03|05 |07|08|10|12) (0[1-9]|[ 1-2][0-9]|3[0-1]) | (04|06|09|11) (0[1-9]| [1-2] [0-9]|30) |02 (0[1-9]|1[0-9]|2[0-8])) [0-9]{3}$/;    &NBSP}     if (Ereg.test (Idcard)) {      document.getElementById (' Nunber_re '). innerhtml= "<div class= ' re ' ><p class= ' TipsSuc ' >< Img src= ' images/b.gif '  class= ' iconsuc '  /> "+errors[0]+" </p></div>;   return true;     &NBSP}     else {      document.getElementById (' Nunber_re '). innerhtml= "<div class= ' re ' ><p class= ' TipsError ' > <img src= ' images/b.gif '  class= ' iconerror '  /> ' +errors[2]+ ' </p></div> ';  return false;      &NBSP}     break;      case 18:     //18 bit ID number detection     if  ( parseint (Idcard.substr (6,4))  %  4 == 0 | |   (parseint Idcard.substr (6,4))  % 100 == 0 && parseint (idcard.substr (6,4)) %4 == 0 )) {    ereg=/^[1-9][0-9]{5}19[0-9]{2} (01|03|05|07|08|10|12) (0[1-9) | [1-2] [0-9]|3[0-1] | (04|06|09|11) (0[1-9]| [1-2] [0-9]|30) |02 (0[1-9]|[ 1-2][0-9]) [0-9]{3}[0-9xx]$/;      } else {    ereg=/^[1-9][0-9]{5}19[0-9]{2} (01|03|05|07|08|10|12) (0[1-9]|[ 1-2][0-9]|3[0-1]) | (04|06|09|11) (0[1-9]| [1-2] [0-9]|30) |02 (0[1-9]|1[0-9]|2[0-8])) [0-9]{3}[0-9xx]$/;    &NBSP}     if (Ereg.test (Idcard)) {     s =   (parseint (idcard_array[0])  + parseint (idcard_array[10))  * 7       +  (parseint (idcard_array[1])  + parseint (idcard_array[11))  * 9       +  (parseint (idcard_array[2])  + parseint (idcard_array[12))  * 10      +  (parseint (idcard_array[3])  + parseint (idcard_array[13))  *  5      +  (parseint (idcard_array[4))  + parseint (idcard_array[14))  * 8      +  (parseint (idcard_array[5))  + parseint (Idcard_ ARRAY[15])  * 4      +  (parseint (idcard_array[6))  + parseint (idcard_array[16))  *  2      + parseint (idcard_array[7])  * 1        + parseint (Idcard_array[8])  * 6      + parseint (Idcard _ARRAY[9])  * 3 ;      Y = S % 11;      M =  "F";      JYM =  "10x98765432";      m = jym.substr (y,1);      if (m == idcard_array[17]) {      document.getElementById (' Nunber_re '). innerhtml= "<div class= ' re ' ><p class= ' TipsSuc ' >< Img src= ' images/b.gif '  class= ' iconsuc '  /> ' +errors[0]+ ' </p></div> ';       return true;     &NBSP}   &nbsp  else {     document.getelementbyid (' nunber_re '). innerHTML= "<div  class= ' re ' ><p class= ' tipserror ' ><img src= ' images/b.gif '  class= ' iconError '  /> "+errors[3]+" </p></div>;           return false;     &NBSP}          else {      document.getelementbyid (' Nunber_re '). innerhtml= "<div class= ' re ' ><p class= ' Tipserror ' ><img src= ' images/b.gif '  class= ' iconerror '  /> ' +errors[2]+ ' </p></div > ";      return false;    &NBSP}     break;     default:       document.getelementbyid (' nunber_re '). Innerhtml= "<div class= ' re ' ><p class= ' tipserror ' ><img src= ' images/b.gif '   Class= ' IConerror '  /> ' +errors[1]+ "</p></div>";      return false; &NBSP}  }