//----This verifies that a required field has been completed

function validate_contact(field,alerttxt)

	{

	var student = document.registration.student;

	var email = document.registration.email;

	var comments = document.registration.comments;

	valid = true;

	if (student.value == "")

	{

		window.alert("Please enter the student's name.");

		student.focus();

		return false;

	}

	

	if (email.value == "")

	{

		window.alert("Please enter your email address.");

		email.focus();

		return false;

	}



	if (comments.value == "")

	{

		window.alert("Please enter your comment/question.");

		comments.focus();

		return false;

	}

return valid;

} 



//---------------------------------------------------------



//----This verifies that a required field has been completed

function validate_registration(field,alerttxt)

	{

	var student = document.registration.student;

	var email = document.registration.email;

	valid = true;

	if (student.value == "")

	{

		window.alert("Please enter the student's name.");

		student.focus();

		return false;

	}



	

	if (email.value == "")

	{

		window.alert("Please enter your email address.");

		email.focus();

		return false;

	}



return valid;

} 



//---------------------------------------------------------







//----This automatically moves the  cursor to the next field once

//----the max-length of the field has been reached

var isNN = (navigator.appName.indexOf("Netscape")!=-1);

function autoTab(input,len, e) {

  var keyCode = (isNN) ? e.which : e.keyCode; 

  var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];

  if(input.value.length >= len && !containsElement(filter,keyCode)) {

    input.value = input.value.slice(0, len);

    input.form[(getIndex(input)+1) % input.form.length].focus();

  }



  function containsElement(arr, ele) {

    var found = false, index = 0;

    while(!found && index < arr.length)

    if(arr[index] == ele)

    found = true;

    else

    index++;

    return found;

  }



  function getIndex(input) {

    var index = -1, i = 0, found = false;

    while (i < input.form.length && index == -1)

    if (input.form[i] == input)index = i;

    else i++;

    return index;

  }

  return true;

}

//------------------------------------------------------------------