1.Validate javascript isValidEmail: function (strEmail) { var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_"; if (strEmail == null) { return false; } if (strEmail.length == 0) { return false; } for (var i = 0; i < strEmail.length; i++) { var letter = strEmail.charAt(i).toLowerCase(); if (validchars.indexOf(letter) != -1) continue; return false; } if (strEmail.indexOf("@") < 1) { return false; } else if (...