<!--
function textFieldValidator(enterQuiz)
{
  // Check the length of the value of the element named 'text_name'
  // from the form named 'form_name'
  if (enterQuiz.username.value.length < 1) {
    mesg = "Email address is required";
    alert(mesg);
    enterQuiz.username.focus();
    return (false);
  } else if (enterQuiz.password.value.length < 1) {
    mesg = "Password is required";
    alert(mesg);
    enterQuiz.password.focus();
    return (false);
  } else if (! echeck(enterQuiz.username.value)) {
    mesg = "Invalid email address";
    alert(mesg);
    enterQuiz.username.focus();
    return (false);
  }

  // If passed tests continue processing
  return (true);
}

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }

		 if (str.indexOf(" ")!=-1){
		    return false
		 }

 		 return true
}

//-->