Common JS Check

Id

function Iscardno (idcard) {///15-bit and 18-bit ID number of the regular expression var regidcard=/^ (^[1-9]\d{7} ((0\d) | ( 1[0-2]) (([0|1|2]\d) |3[0-1]) \d{3}$) | (^[1-9]\d{5}[1-9]\d{3} ((0\d) | (     1[0-2]) (([0|1|2]\d) |3[0-1]) ((\d{4}) |\d{3}[xx]) $) $/; If you pass this verification, the ID card format is correct, but the accuracy is also calculated if (Regidcard.test (Idcard)) {if (idcard.length==18) {var idcardwi=new Array (7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); Save the first 17-bit weighting factor in the array var idcardy=new array (1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2); This is divided by 11, it is possible to generate 11-bit remainder, verification code, also save an array of Var idcardwisum=0; Used to store the sum of the first 17 bits and the weighted factor for the (Var i=0;i< -; i++) {idcardwisum+=idcard.substring (i,i+1) *idcardwi[i]; } var idcardmod=idcardwisum%11;//calculates the position of the array where the checksum is locatedvar idcardlast=idcard.substring (17);//Get last ID number//If equals 2, then the check code is 10, the last digit of the ID number should be x if (Idcardmod==2) {        if (Idcardlast= = "X" | | idcardlast== "X") {return true;        }else{return false; }}else{//Use the computed verification code to match the last identity card number, if it is consistent, the description passes, otherwise it is an invalid ID number if (idcardlast==idcardy[idcardmod]) {             return true;        }else{return false;     }}}}else{return false; }    }

Digital

function Isnumber (string,info) {     var number;    if (string==null) {        alert (info+ "can only enter numbers");        return false;     }    Number = new number (string);     if (IsNaN (number))     {         alert (info+ "can only enter numbers");        return false;     } else{        return true;    }}

Email

function Checkemail (email) {        var reemail =/^ ([a-za-z0-9]) (\w) [email protected] (\w) + (\.) (com|com\.cn|net|cn|net\.cn|org|biz|info|gov|gov\.cn|edu|edu\.cn)/;        if (!email.match (reemail) &&email! = "")        {                alert (' email format is incorrect! ');                return true;        }        else         {        return false;}        }

Empty

//----------------------------------------------------space to determine function iswhitespace (s) {     var whitespace = "\t\n \ r ";    var i;     < s . Length; i++)    {         = S.charat (i);          >= 0)         {        return true;        }    }        return false;}

Character

//--------------------------------------------------test character (limit characters that cannot be entered) function Ischar (s) {    var ErrorChar;    var Badchar = "><, []{}?/+=|\\ ' \":; [ Email protected]#$%^& () ' ";           " ")    {        alert ("Please enter your content!") ")        return false;    }        if (Iswhitespace (s))    {        alert ("characters entered cannot contain spaces, please re-enter!) ");         return false;    }    return true;}

Date

Date function Redate (s) {    s=s.split ("-");    S=s[0].replace ("\-", "") +s[1].replace ("\-", "") +s[2].replace ("\-", "");    return s;}

function Checkidno (sId) {    if (!/^\d{17} (\d|[ X]) $/i.test (sId) {          alert ("Please enter the correct ID number!");         return   false;       }       return true;}

Common JS Check