var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"內蒙古", 
21:"遼寧",22:"吉林",23:"黑龍江",31:"上海",32:"江蘇",33:"浙江", 
34:"安徽",35:"福建",36:"江西",37:"山東",41:"河南",42:"湖北", 
43:"湖南",44:"廣東",45:"廣西",46:"海南",50:"重慶",51:"四川" 
,52:"貴州",53:"云南",54:"西藏",61:"陜西",62:"甘肅",63:"青海", 
64:"寧夏",65:"新疆",71:"臺灣",81:"香港",82:"澳門",91:"國外"}  

 
function isCardID(sId){ 
  var iSum=0 ; 
  var info="" ; 
  if(!/^/d{17}(/d|x)$/i.test(sId)) return "你輸入的身份證長度或格式錯誤"; 
  sId=sId.replace(/x$/i,"a"); 
  if(aCity[parseInt(sId.substr(0,2))]==null) return "你的身份證地區非法"; 
  sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); 
  var d=new Date(sBirthday.replace(/-/g,"/")) ; 
  if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))return "身份證上的出生日期非法"; 
  for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ; 
  if(iSum%11!=1) return "你輸入的身份證號非法"; 
  return true;//aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女")  
}