Validate email address format in javascript

Email address fields validation through javascript

function validate_email(fieldid, msgid, error_icon_star) {

    var field = document.getElementById(fieldid);

    with (field) {

        if (check_blank(fieldid, msgid)) {

            apos = value.indexOf("@");

            dotpos = value.lastIndexOf(".");

            if (apos < 1 || dotpos - apos < 2) {

                document.getElementById(msgid).innerHTML = 'please enter correct email';

                //document.getElementById(error_icon_star).innerHTML='<img src="WebResource.gif" height="15px" style="width:15px;"/>';

                return false;

            }

            else {

                document.getElementById(msgid).innerHTML = "&nbsp;";

                //document.getElementById(error_icon_star).innerHTML='<b style="color:Red">*</b>';

                return true;

            }

        }

        return false;

    }

}

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