?? 16.15 身份證的驗證.htm
字號:
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>標題頁</title>
<SCRIPT LANGUAGE="JavaScript">
function isCardNo(num)
{
if (isNaN(num)) {alert("輸入的不全是數字！"); return false;}
var len = num.length, re;
if (len == 15) //15位身份證的判斷
re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);
else if (len == 18) //18位身份證的判斷
re = new RegExp(/^(\d{6})()?(\d{4})(\d{2})(\d{2})(\d{3})(\d)$/);
else {alert("輸入的數字位數不對！"); return false;}
var a = num.match(re);//判斷是否有符合條件的表達式
if (a != null)
{
if (len==15)
{ //對15位身份證中日期的判斷
var D = new Date("19"+a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
else
{ //對18位身份證中日期的判斷
var D = new Date(a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getFullYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
if (!B) {alert("輸入的身份證號 "+ a[0] +" 里出生日期不對！"); return false;}
}
return true;
}
</script>
</head>
<body>
<input type=text name="txt1" value="1110120780423003">
<input type=button value="判斷身份證號" onClick="javascript:alert(isCardNo(txt1.value))">
</body>
</html>
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