// FormChek.js
//
// SUMMARY
//
// Production Javascript code 
//
//

function checkEmail(checkString)
{
    var newstr = "";
    var at = false;
    var dot = false;

    // DO SOME PRELIMINARY CHECKS ON THE DATA

    // IF EMAIL ADDRESS HAS A '@' CHARACTER
    if (checkString.indexOf("@") != -1) {
      at = true;

    // IF EMAIL ADDRESS HAS A '.' CHARACTER
    } else if (checkString.indexOf(".") != -1) {
      dot = true;
    }
    // PARSE REMAINDER OF STRING
    for (var i = 0; i < checkString.length; i++) {
        ch = checkString.substring(i, i + 1)
        if ((ch >= "A" && ch <= "Z") || (ch >= "a" && ch <= "z")
                || (ch == "@") || (ch == ".") || (ch == "_")
                || (ch == "-") || (ch >= "0" && ch <= "9")) {
                newstr += ch;
                if (ch == "@") {
                    at=true;
                }
                if (ch == ".") {
                    dot=true;
                }
        }
    }
    if ((at == true) && (dot == true)) {
		return newstr;
       
    }
    else {
      // DISPLAY ERROR MESSAGE
      if (checkString == "789") {return newstr;}	
      alert ("Sorry, the email address you\nentered is not in the correct\nformat.\nexample: yourname@mail.com");
      // Eliminated checkString return to test for valid address form 
      // at time submit button is pressed.
      //return checkString; 
      return false;
    
    }

}