//asp.net custom validator passes source object and arguments parameters... arguments parameter contains .Value and .IsValid properties...
function IsMailValid(srcObject, arguments) {
    return_tag = true;
    Ids = arguments.Value;
    if (Ids !="") {
        //if (mfield_name && mfield_name != "") {
        //    msgInvaildTestMailId = " - " + mfield_name + " is Invalid"
        //} else {
        //    msgInvaildTestMailId = " - Email ID is Invalid"
        //}

        //var Ids = document.getElementById("fvCampaignAddress_txtTestEmailIDs").value;
        var rows = Ids.split(','); 
        var rowsColon
        var status = 0;
        for(i=0;i<rows.length;i++) {
            rowsColon = rows[i].split(';');
            if(rowsColon.length > 0) {
                for(k=0;k<rowsColon.length;k++) {
                    var id= trimAll(rowsColon[k])
                    if(CheckEmail(id)==false && id != "") {
                        //alert(msgInvaildTestMailId);
                        //error_str  = error_str + "* " + id + msgInvaildTestMailId + "\n"
                        return_tag = false
                        //return false;  
                    }        
                }
            } else {
                if(CheckEmail(trimAll(rowsColon))==false && id != "") {
                   //alert(msgInvaildTestMailId);
                    //error_str  = error_str + "* " + rowsColon + msgInvaildTestMailId + "\n"
                    return_tag = false
                   //return false;  
                }
            }
        }
        //if (!return_tag) return return_tag
        arguments.IsValid = return_tag
    }
}

function CheckEmail(aEmailId) {
    var topDomains = "AC|AD|AE|AERO|AF|AG|AI|AL|AM|AN|AO|AQ|AR|ARPA|AS|ASIA|AT|AU|AW|AX|AZ|BA|BB|BD|BE|BF|BG|BH|BI|BIZ|BJ|BM|BN|BO|BR|BS|BT|BV|BW|BY|BZ|CA|CAT|CC|CD|CF|CG|CH|CI|CK|CL|CM|CN|CO|COM|COOP|CR|CU|CV|CX|CY|CZ|DE|DJ|DK|DM|DO|DZ|EC|EDU|EE|EG|ER|ES|ET|EU|FI|FJ|FK|FM|FO|FR|GA|GB|GD|GE|GF|GG|GH|GI|GL|GM|GN|GOV|GP|GQ|GR|GS|GT|GU|GW|GY|HK|HM|HN|HR|HT|HU|ID|IE|IL|IM|IN|INFO|INT|IO|IQ|IR|IS|IT|JE|JM|JO|JOBS|JP|KE|KG|KH|KI|KM|KN|KP|KR|KW|KY|KZ|LA|LB|LC|LI|LK|LR|LS|LT|LU|LV|LY|MA|MC|MD|ME|MG|MH|MIL|MK|ML|MM|MN|MO|MOBI|MP|MQ|MR|MS|MT|MU|MUSEUM|MV|MW|MX|MY|MZ|NA|NAME|NC|NE|NET|NF|NG|NI|NL|NO|NP|NR|NU|NZ|OM|ORG|PA|PE|PF|PG|PH|PK|PL|PM|PN|PR|PRO|PS|PT|PW|PY|QA|RE|RO|RS|RU|RW|SA|SB|SC|SD|SE|SG|SH|SI|SJ|SK|SL|SM|SN|SO|SR|ST|SU|SV|SY|SZ|TC|TD|TEL|TF|TG|TH|TJ|TK|TL|TM|TN|TO|TP|TR|TRAVEL|TT|TV|TW|TZ|UA|UG|UK|UM|US|UY|UZ|VA|VC|VE|VG|VI|VN|VU|WF|WS|XN--0ZWM56D|XN--11B5BS3A9AJ6G|XN--80AKHBYKNJ4F|XN--9T4B11YI5A|XN--DEBA0AD|XN--G6W251D|XN--HGBK6AJ7F53BBA|XN--HLCJ6AYA9ESC7A|XN--JXALPDLP|XN--KGBECHTV|XN--ZCKZAH|YE|YT|YU|ZA|ZM|ZW";
    var EmailValStr = "^[a-z0-9-_]+(?:\\.[a-z0-9-_]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+";
    EmailValStr = EmailValStr + "(" + topDomains + ")\\b$";
    var EmailRegExp  =  new RegExp(EmailValStr,"i");
    return EmailRegExp.test(aEmailId);
}

function trimAll(sString) {
    while (sString.substring(0,1) == ' ') {
        sString = sString.substring(1, sString.length);
    }
    while (sString.substring(sString.length-1, sString.length) == ' ') {
        sString = sString.substring(0,sString.length-1);
    } 
    return sString;
}