完整代码如下：
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>验证身份证号码_www.jb200.com</title>
<script type="text/javascript">
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:"雲南",54:"西藏",61:"陝西",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 checkCard(sId){
var iSum=0
var info=""
var result = new Array() ;
if(sId.length!=15 && sId.length!=18)
{
result[0] = false ;
result[1] = "身份證號碼長度錯誤";
return result;
}
if(sId.length==15)
{//15位身份證驗證
if (isNaN(sId))
{
result[0] = false ;
result[1] = "身份證號碼格式錯誤";
return result;
}
if(aCity[parseInt(sId.substr(0,2))]==null)
{
result[0] = false ;
result[1] = "非法地區";
return result ;
}
var sBirthday="19"+sId.substr(6,2)+"-"+Number(sId.substr(8,2))+"-"+Number(sId.substr(10,2));
var d=new Date(sBirthday.replace(/-/g,"/")) ;
if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))
{
result[0] = false ;
result[1] = "非法生日";
return result ;
}
}
else
{//18位身份證驗證
if(!/^d{17}(d|x)$/i.test(sId))
{
result[0] = false ;
result[1] = "非身份證號碼";
return result;
}
sId=sId.replace(/x$/i,"a");
if(aCity[parseInt(sId.substr(0,2))]==null)
{
result[0] = false ;
result[1] = "非法地區";
return result ;
}
var 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()))
{
result[0] = false ;
result[1] = "非法生日";
return result ;
}
for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ;
if(iSum%11!=1)
{
result[0] = false ;
result[1] = "非法證號";
return result ;
}
}
result[0] = true ;
var Sex_Flag = (sId.length==15) ? sId.substr(14,1) : sId.substr(16,1); //男性為奇數，女性為偶數
result[1] = "合法證件rnrn證件基本信息為："+aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(Sex_Flag%2?"男":"女") ;
return result ;
}
function checkResult(w)
{
var sId = w.value ;
if( sId != "")
{
var result = checkCard(sId);
if( result[0] == false )
{
w.focus();
alert(result[1]);
}
else
{//真正使用時，屏蔽掉該分支即可
alert(result[1]);
}
}
}
</script>
</head>
<body>
<div style="height:100%;">
<div style="text-align:center; "><span>15或18位身份證號碼驗證</span></div>
<div style="height:90%;"><span>請輸入一個身份證號碼：</span><input type="text" onblur="checkResult(this)" maxlength="18" /></div>
</div>
</body>
</html>