<SCRIPT>
function?? checkIdcard(idcard){??
var?? Errors=new?? Array(??
"验证通过!",??
"身份证号码位数不对!",??
"身份证号码出生日期超出范围或含有非法字符!",??
"身份证号码校验错误!",??
"身份证地区非法!"??
);??
var?? area={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:"xingjiang",71:"台湾",81:"香港",82:"澳门",91:"国外"}????
???
var?? idcard,Y,JYM;??
var?? S,M;??
var?? idcard_array?? =?? new?? Array();??
idcard_array?? =?? idcard.split("");??
//地区检验??
if(area[parseInt(idcard.substr(0,2))]==null)?? return?? Errors[4];??
//身份号码位数及格式检验??
switch(idcard.length){??
case?? 15:??
if?? (?? (parseInt(idcard.substr(6,2))+1900)?? %?? 4?? ==?? 0?? ||?? ((parseInt(idcard.substr(6,2))+1900)?? %?? 100?? ==?? 0?? &&?? (parseInt(idcard.substr(6,2))+1900)?? %?? 4?? ==?? 0?? )){??
ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$/;//测试出生日期的合法性??
}?? else?? {??
ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/;//测试出生日期的合法性??
}??
if(ereg.test(idcard))?? return?? Errors[0];??
else?? return?? Errors[2];??
break;??
case?? 18:??
//18位身份号码检测??
//出生日期的合法性检查????
//闰年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))??
//平年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))??
if?? (?? parseInt(idcard.substr(6,4))?? %?? 4?? ==?? 0?? ||?? (parseInt(idcard.substr(6,4))?? %?? 100?? ==?? 0?? &&?? parseInt(idcard.substr(6,4))%4?? ==?? 0?? )){??
ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$/;//闰年出生日期的合法性正则表达式??
}?? else?? {??
ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/;//平年出生日期的合法性正则表达式??
}??
if(ereg.test(idcard)){//测试出生日期的合法性??
//计算校验位??
S?? =?? (parseInt(idcard_array[0])?? +?? parseInt(idcard_array[10]))?? *?? 7??
+?? (parseInt(idcard_array[1])?? +?? parseInt(idcard_array[11]))?? *?? 9??
+?? (parseInt(idcard_array[2])?? +?? parseInt(idcard_array[12]))?? *?? 10??
+?? (parseInt(idcard_array[3])?? +?? parseInt(idcard_array[13]))?? *?? 5??
+?? (parseInt(idcard_array[4])?? +?? parseInt(idcard_array[14]))?? *?? 8??
+?? (parseInt(idcard_array[5])?? +?? parseInt(idcard_array[15]))?? *?? 4??
+?? (parseInt(idcard_array[6])?? +?? parseInt(idcard_array[16]))?? *?? 2??
+?? parseInt(idcard_array[7])?? *?? 1????
+?? parseInt(idcard_array[8])?? *?? 6??
+?? parseInt(idcard_array[9])?? *?? 3?? ;??
Y?? =?? S?? %?? 11;??
M?? =?? "F";??
JYM?? =?? "10X98765432";??
M?? =?? JYM.substr(Y,1);//判断校验位??
if(M?? ==?? idcard_array[17])?? return?? Errors[0];?? //检测ID的校验位??
else?? return?? Errors[3];??
}??
else?? return?? Errors[2];??
break;??
default:??
return?? Errors[1];??
break;??
}??
}

?

function check(){
?var sf=document.f1.idcard.value;
?
?? if(checkIdcard(document.f1.idcard.value)!="验证通过!")
?? {
??? alert(checkIdcard(document.f1.idcard.value));
??? return false;
?}
???
}
</SCRIPT>

<form action="" name="f1" method="post">
<input name="idcard" type="idcard" class="input1" value="">
<input name="Submit