function isNumberString (InString,RefString){	if(InString.length==0) return (false);	for (Count=0; Count < InString.length; Count++){		TempChar= InString.substring (Count, Count+1);		if (RefString.indexOf (TempChar, 0)==-1)  		return (false);	}	return (true);}function isIDString (idnum){	var re=/^[\w][\w-.]*[\w]$/i;	if(re.test(idnum))		return true;	else		return false;}function ckid(idtype,idnum){	if ( idtype(idtype) )	   return ckidnum(idnum);	else		return false;}function ckidtype(idtype){	  if ( idtype.value < 0 || idtype.value > 3 ){    alert("\請您選擇正確的證件類別 !!")    return false;  }  return true;}function ckidnum(idtype,idnum){	if ( idnum.length == 0 ){		   alert("\請您輸入證件號碼 !!")		   return false;	}		var same = true	for (Count=1; Count < idnum.length; Count++){		if (  idnum.substring (Count, Count+1) != idnum.substring (Count-1, Count) )  {		     same=false		     break;		}	}	if ( same ){		 alert("\證件號碼錯誤 !!")		 return false;	}		if ( idtype == 0){		if( idnum.length !=15 && idnum.length !=18 ) {		   alert("\請您輸入15/18位的正確身份證號 !!")		   return false;	    }		if( idnum.length ==15 && isNumberString(idnum,"1234567890")!=1){		   alert("\您輸入的身份證號含有非法字符 !!")		   return false;		}		if ( idnum.length ==18 ){			var cardNo= idnum.substring(0,17);			if (isNumberString(cardNo,"1234567890")!=1){				alert("\您輸入的身份證號含有非法字符 !!")				return false;			}			cardNo= idnum.substring(17,18);			if (isNumberString(cardNo,"1234567890Xx")!=1){				alert("\您輸入的身份證號含有非法字符 !!")				return false;			}		}  }else{		if( idnum.length <6 || idnum.length >18 ) {			alert("\請您輸入有效證件號碼，證件號長度在6－18間 !!")			return false;		}		if (!isIDString(idnum)){			alert("\有效的證件號碼號只能有數字、字母組成!!")			return false;		}  }  return true;}