JAVASCRIPT身份证验证函数

functionCheckIDCard(StrNumber)
...{
//判断身份证号码格式函数
//公民身份号码是特征组合码，
//排列顺序从左至右依次为：六位数字地址码，八位数字出生日期码，三位数字顺序码和一位数字校验码

//身份证号码长度判断
if(StrNumber.length<15||StrNumber.length==16||StrNumber.length==17||StrNumber.length>18)
...{
CheckIDCard=false;
}

//身份证号码最后一位可能是超过100岁老年人的X
//所以排除掉最后一位数字进行数字格式测试
//全部换算成17位数字格式

varAi;
if(StrNumber.length==18)
...{
Ai=StrNumber.substring(0,17);
}
else
...{
Ai=StrNumber.substring(0,6)+"19"+StrNumber.substring(6,9);
}

if(IsNumeric(Ai)==false)
...{
returnfalse;
}

varstrYear,strMonth,strDay,strBirthDay;
strYear=parseInt(Ai.substring(Ai,6,4));
strMonth=parseInt(Ai.substring(Ai,10,2));
strDay=parseInt(Ai.substring(Ai,12,2));

if(IsValidDate(strYear,strMonth,strDay)==false)
...{
returnfalse;
}

vararrVerifyCode=newArray("1","0","x","9","8","7","6","5","4","3","2");
varWi=newArray(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2);

vari,TotalmulAiWi=0;
for(i=0;loop<16;loop++)
...{
TotalmulAiWi=TotalmulAiWi+parseInt(Ai.substring(i+1,1))*Wi[i];
}

varmodValue=TotalmulAiWi%11;
varstrVerifyCode=arrVerifyCode[modValue];

Ai=Ai&strVerifyCode;

if((StrNumber.length==18)&&(StrNumber!=Ai))
...{
returnfalse;
}

}

functionIsNumeric(oNum)
...{
if(!oNum)returnfalse;
varstrP=/^d+(.d+)?$/;
if(!strP.test(oNum))returnfalse;
try...{
if(parseFloat(oNum)!=oNum)returnfalse;
}
catch(ex)
...{
returnfalse;
}
returntrue;
}

functionIsValidDate(psYear,psMonth,psDay)
...{
if(psYear==null||psMonth==null||psDay==null)
...{
returnfalse;
}

varsYear=newString(psYear);
varsMonth=newString(psMonth);
varsDay=newString(psDay);

if(IsValidYear(sYear)==false)
...{
returnfalse;
}

if(IsValidMonth(sMonth)==false)
...{
returnfalse;
}

if(IsValidDay(sDay)==false)
...{
returnfalse;
}

varnYear=parseInt(sYear,10);
varnMonth=parseInt(sMonth,10);
varnDay=parseInt(sDay,10);

if(sYear==""&&sMonth==""&&sDay=="")
...{
returntrue;
}

if(sYear==""||sMonth==""||sDay=="")
...{
returnfalse;
}

if(nMonth<1||12<nMonth)
...{
returnfalse;
}
if(nDay<1||31<nDay)
...{
returnfalse;
}

if(nMonth==2)
...{
if((nYear%400==0)||(nYear%4==0)&&(nYear%100!=0))
...{
if((nDay<1)||(nDay>29))
...{
returnfalse;
}
}
else
...{
if((nDay<1)||(nDay>28))
...{
returnfalse;
}
}
}
elseif((nMonth==1)||
(nMonth==3)||
(nMonth==5)||
(nMonth==7)||
(nMonth==8)||
(nMonth==10)||
(nMonth==12))
...{
if((nDay<1)||(31<nDay))
...{
returnfalse;
}
}
else
...{
if((nDay<1)||(30<nDay))
...{
returnfalse;
}
}

returntrue;
}