<script  language="JavaScript">
function  test(){
var  n;
if(/^\d{15}$/.test(card.value))  n  =  /^(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)(\d{3})$/.exec(card.value);
if(/^\d{18}$/.test(card.value))  n  =  /^(\d\d)(\d\d)(\d\d)(\d{4})(\d\d)(\d\d)(\d{4})$/.exec(card.value);
if(n)
alert(
'身份证号码是：'  +  n[0]  +  '\n'  +
n[1]  +  '  省'  +  '\n'  +
n[2]  +  '  市'  +  '\n'  +
n[3]  +  '  区'  +  '\n'  +
'出生日期：'  +  n[4]  +  '年'  +  n[5]  +  '月'  +  n[6]  +  '日\n'  +
'编号：'  +  n[7]  +  '\n'  +
'性别：'  +  (n[7]  %  2  ==  0  ?  '女'  :  '男')
);
else
alert('没有正确输入');
}
</script>
<input  name="card">
<input  type="button"  value="Test"  onClick="test()">