身份证严格验证， 验证IP地址

<script> 
var aCity={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"} 

function cidInfo(sId){ 
var iSum=0 
var info="" 
if(!/^\d{17}(\d|x)$/i.test(sId))return false; 
sId=sId.replace(/x$/i,"a"); 
if(aCity[parseInt(sId.substr(0,2))]==null)return "Error:非法地区"; 
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 "Error:非法生日"; 
for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) 
if(iSum%11!=1)return "Error:非法证号"; 
return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?" 男":"女") 
} 


document.write(cidInfo("380524198002300016"),"<br/>"); 
document.write(cidInfo("340524198002300019"),"<br/>") 
document.write(cidInfo("340524197711111111"),"<br/>") 
document.write(cidInfo("34052419800101001x"),"<br/>"); 
document.write(cidInfo("380524198002300016"),"<br/>"); 
</script>