<!-- Vignette StoryServer 5.0 Tue Jul 30 13:11:22 2002 -->
formCancel = false;

function trimText(checkField,limit) {

	// if too long...trim it!
	if (!checkTextTooLong(checkField,limit)) 
	{
		checkField.value = checkField.value.substring(0, limit);
	}
}

// check if we're looking at a valid URL
function isURL(checkStr)
{
  if (checkStr.match(/^(\s)*((h|H)(t|T)(t|T)(p|P):\/\/)?([A-Za-z0-9_-]+\.)+[A-Za-z]+[A-Za-z]+(\/(.*))?(\s)*$/g) != null) {  
    return true;
  }
  return false;
}
function checkURL(checkField)
{
  if (checkField.value && !isURL(checkField.value))
  {
    alert("The '"+getFieldName(checkField)+"' field is invalid, please try again. \nIt must be a valid web address (example: www.domain.com).\n");
    checkField.focus();
    return false;
  }

  return true;
}

// check to see the given year is leap year or not
// Input: Year, 2 or 4 digit
// Output: if is a leap year, then true. Otherwise false
function isLeapYear(year)
{
	if (year < 100)
		if (year < 50)
			year = year + 2000;
		else
			year = year + 1900;
	if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))
		return true;
	else
		return false;
}

function isAlpha(checkStr)
{
  // allow ONLY alphanumeric keys, no symbols or punctuation
  // this can be altered for any "checkOK" string you desire
  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
	{
      if (ch == checkOK.charAt(j))
	  {
        break;
	  }
    }
    if (j == checkOK.length)
    {
      return false;
    }
  }
  return true;
}

function isNumber(checkStr)
{
  // allow ONLY alphanumeric keys, no symbols or punctuation
  // this can be altered for any "checkOK" string you desire
  var checkOK = "0123456789";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
	{
      if (ch == checkOK.charAt(j))
	  {
        break;
	  }
    }
    if (j == checkOK.length)
    {
      return false;
    }
  }
  return true;
}

function isEmail(checkStr)
{
//  if (checkStr.match(/[^@ ]+@[A-Za-z0-9_-]+.(com|org|net|biz|cc|tv|gov|mil|us)/g) != null) {
  if (checkStr.match(/[A-Za-z0-9_-]+(.[A-Za-z0-9_-])*@([A-Za-z0-9_-]+.)+[A-Za-z]+[A-Za-z]+/g) != null) {  
	
    return true
  }
  return false;
}


function isAlphanum(checkStr)
{
  // allow ONLY alphanumeric keys, no symbols or punctuation
  // this can be altered for any "checkOK" string you desire
  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ";
  for (i = 0;  i < checkStr.length;  i++)
 {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      return false;
    }
  }
  return true;
}


function isRadioButtonBlank(radioButton)
{
  // require at least one radio button be selected
  for (i = 0;  i < radioButton.length;  i++)
  {
    if (radioButton[i].checked)
        return true;
  }  
  return false;
}


function isPhone(checkStr)
{
  // remove all extraneous characters and any leading ones... then count, there should be 10 digits.
  // allow ONLY alphanumeric keys, no symbols or punctuation
  // this can be altered for any "checkOK" string you desire

  var checkOK = "0123456789";
  var checkResult = "";
  var ch = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    //eliminate leading 1 (we don't want 1-800; instead we want 800)
	if((ch == '1') && (i == 0))
	{
	  ch = '';
	}
    for (j = 0;  j < checkOK.length;  j++)
    {
      if (ch == checkOK.charAt(j))
      {
		break;
	  }
      // if we've reached the end of the acceptable strings and there is no match, then this char is invalid.
      if(j == (checkOK.length-1)){ch = '';}
    }
	checkResult += ch;
  }

  if(checkResult.length == 10)
  {
    return true;
  }
  return false;
}


function getFieldName(checkField)
{
  var fieldName = '';
  fieldName = checkField.alias;
  if(!fieldName)
  {
    fieldName = checkField.name;
  }
  return fieldName;
}

function checkAlphanum(checkField)
{
  if (checkField.value && !isAlphanum(checkField.value))
  {
    alert("Please enter only letter and numeric characters in the '"+getFieldName(checkField)+"' field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkAge(checkField)
{
 	if(checkField.value < 18)
	{
		alert("You must be at least 18 years old to register! DETAILS FOR TEAMS 18 YEARS OR YOUNGER: All Teams that contain Players under 18 may not register online because all minors require a parent's signature. If you or any of your teammates are under 18 years of age, please print out registration form located at the bottom of the event details page. Please print out this PDF and send it in with the Parent or Guardian signature. Also, make sure that when you print it out, you have specified the landscape setting for your printed output, instead of portrait, which is located in print setup.");
		checkField.focus();
		return false;
	}
  return true;
}


function checkBlank(checkField)
{
  // check to see if a field is blank
  if (checkField.value == "")
  {
    alert("You must enter a value for the '"+getFieldName(checkField)+"' field, please try again.");
    checkField.focus();
    return (false);
  }
  return false;
}

function checkAlpha(checkField)
{
  if (checkField.value && !isAlpha(checkField.value))
  {
    alert("Please enter only alphabetic characters for the '"+getFieldName(checkField)+"' field, please try again.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkNum(checkField)
{
  if (checkField.value && !isNumber(checkField.value))
  {
    alert("Please enter only numbers in the '"+getFieldName(checkField)+"' field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkZip(checkField)
{
  if ((checkField.value && !isNumber(checkField.value)) || checkField.value.length != 5)
  {
    alert("Please enter a valid Zip Code in the '"+getFieldName(checkField)+"' field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkPostalCode(checkField)
{	
  
  if ((checkField.value && !isAlphanum(checkField.value)) || ( checkField.value.length != 6 && checkField.value.length != 7))
  {
    alert("Please enter a valid Postal Code in the '"+getFieldName(checkField)+"' field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkEmail(checkField)
{
  if (checkField.value && !isEmail(checkField.value))
  {
    alert("The '"+getFieldName(checkField)+"' field is invalid, please try again. \nIt must contain an '@' and a '.' following the '@'.");
    checkField.focus();
    return false;
  }

  return true;
}

function checkTextTooLong(checkField, n)
{
  // allow only 'n' characters maximum in the field
  if (checkField.value.length > n)
  {
    alert("Please enter at most "+n.toString()+" characters in the " + getFieldName(checkField) + " field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkTextTooShort(checkField, n)
{
  // allow only 'n' characters maximum in the field
  if (checkField.value.length < n)
  {
    alert("Please enter at least "+n.toString()+" characters in the '"+getFieldName(checkField)+"' field.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkPhone(checkField)
{
  if (checkField.value && !isPhone(checkField.value))
  {
    alert("The '"+getFieldName(checkField)+"' field is invalid, please try again. \nIt must be in the format ###-###-####.");
    checkField.focus();
    return (false);
  }
  return true;
}

function checkSelectBox(selectBox)
{
  // check if the first drop down is selected, if so, invalid selection
  var i = selectBox.selectedIndex;
  if (selectBox.options[i].value == '')
  {
    alert("The first '"+getFieldName(selectBox)+"' option is not a valid selection.\nPlease choose one of the other options.");
    selectBox.focus();
    return (false);
  }
  return true;
}

function checkHeightSelectBox(selectBox)
{
  // check to see if the value is zero
  if (selectBox.value == 0)
  {
    alert("It is not possible to select the zero option for the "+getFieldName(selectBox)+" field. please try again.");
    selectBox.focus();
    return (false);
  }
  return true;
}

function checkRadioButton(radioButton)
{
  if (!isRadioButtonBlank(radioButton))
  {
    alert("Please select one of the '"+getFieldName(radioButton)+"' options.");
    return (false);
  }
  return true;
}

// requires there be a theForm.required object to contain the bit flags to determine which fields are required.
function checkRequired(theForm)
{

  if (formCancel == true) {return true;}

  for (i = 0;  i < theForm.elements.length;  i++)
  {
    var formElement = theForm.elements[i];
    // this code does more work than it needs to, but its readable and simple so I chose it instead.
	// (in cases where n instances for a given name exist it can perform up to the square of n checks for that name.)
    if(theForm.required[formElement.name]){
	  if(formElement.type == "checkbox"){
        var isChecked = false;
        if(formElement.checked && formElement.value != ""){isChecked = true;}
		if(!isChecked)
		{
          alert("'"+getFieldName(formElement)+"' is a required field.\nPlease check continue.");
          formElement.focus();
          return (false);
		}
	  }else if(formElement.type == "password" && !formElement.value){
        alert("The '"+getFieldName(formElement)+"' field is a required password.\nPlease fill it out to continue.");
        formElement.focus();
        return (false);
	  }else if(formElement.type == "radio"){
        var isChecked = false;

		// if there is only one radio button lets see if its checked.
		if (theForm[formElement.name].length == undefined && formElement.checked){
          isChecked = true; break;
		}
        for (j = 0;  j < theForm[formElement.name].length;  j++)
		{
          var formRadio = theForm[formElement.name][j];
          if(formRadio.checked){isChecked = true; break;}
		}
		if(!isChecked)
		{
          alert("'"+getFieldName(formElement)+"' is a required field.\nPlease select one to continue.");
          formElement.focus();
          return (false);
		}
	  }else if(formElement.type == "select-one"){
	    var j = formElement.selectedIndex;
        if (formElement.options[j].value == '')
        {
          alert("The '"+getFieldName(formElement)+"' select-box is a required field.\nPlease choose a valid selection to continue.");
          formElement.focus();
          return (false);
        }
	  }else if(formElement.type == "select-multiple"){
	    var j = formElement.selectedIndex;
        var isChecked = false;
        if (formElement.selectedIndex == -1)
        {
          alert("The '"+getFieldName(formElement)+"' select-box is a required field.\nPlease choose a valid selection to continue.");
          formElement.focus();
          return (false);
        } else {
          for (var k = 0;  k <= formElement.length;  k++)
          {
            if(formElement.options[k].selected && formElement.options[k].value != ""){isChecked = true; break;} 
          }
          if(!isChecked)
          {
	        alert("The '"+getFieldName(formElement)+"' field is a required field.\nPlease select one or more valid selections to continue.");
	        formElement.focus();
	        return (false);
          }
		}
	  }else if(formElement.type == "text"  && !formElement.value){
        alert("The '"+getFieldName(formElement)+"' field is a required field.\nPlease fill it out to continue.");
        formElement.focus();
        return (false);
	  }else if(formElement.type == "textarea" && !formElement.value){
        alert("The '"+getFieldName(formElement)+"' field is a required field.\nPlease fill it out to continue.");
        formElement.focus();
        return (false);
	  }
	}
  }
  return true;
}

// requires there be a theForm.alias object to contain the relationships between variables and their aliases.
function setFieldAlias (theForm)
{
  for (i = 0;  i < theForm.elements.length;  i++)
  {
    var formElement = theForm.elements[i];
	if(formElement.name)
	{
      formElement.alias = theForm.alias[formElement.name];
	}
  }

  return true;
}

function checkValidChar (theForm)
{

  if (formCancel == true) {return true;}
  
  for (i = 0;  i < theForm.elements.length;  i++)
  {
    var formElement = theForm.elements[i];

    // this code does more work than it needs to, but its readable and simple so I chose it instead.
    if(((formElement.type == "password") || (formElement.type == "text") || (formElement.type == "textarea"))
      && formElement.value)
	{
	  // allow ONLY valid characters, no double quotes (or any other chars we deem bad later on)
	  // (see: checkValidChar)
	  // this can be altered for any "checkInvalid" string you desire
	  var checkInvalid = '"{}';
      formElement.invalidChar = '';
      var checkStr = formElement.value;
      var ch = '';
	  for (j = 0;  j < checkStr.length;  j++)
	  {
        ch = checkStr.charAt(j);
	    for (k = 0;  k < checkInvalid.length;  k++)
	    {
		  // double quotes are acceptable in textarea field types.
	      if (ch == '"' && formElement.type == "textarea") {continue;}

	      if (ch == checkInvalid.charAt(k))
	      {
	        formElement.invalidChar = ch;
	        break;
		  }
		}
	  }

      if(formElement.invalidChar != '')
	  {
	    alert("The '"+getFieldName(formElement)+"' field contains a "+formElement.invalidChar+", which is an invalid character.\nPlease remove it to continue.");
        formElement.focus();
        return (false);
	  }
    }
  }
  return true;
}

//For Select dropdowns, just feed in the respective fields.
function checkTheBDay(checkField_YYYY, checkField_MM, checkField_DD, limit)
{
	today = new Date();
	var birthDate = new Date(checkField_YYYY.options[checkField_YYYY.selectedIndex].value, 
  						   checkField_MM.options[checkField_MM.selectedIndex].value - 1, 
 						   checkField_DD.options[checkField_DD.selectedIndex].value);
	difference = getAgeFromDates(birthDate, today);
	if(difference < limit)
	{
		alert("You must be at least "+limit+" years old to register!");
		checkField_MM.focus();
		return false;
	}
	return true;
}

function checkBirthdate(checkField, limit)
{
	today = new Date();
	difference = getAgeFromDates(getDateFromField(checkField), today);
	if(difference < limit)
	{
		alert("You must be at least "+limit+" years old to register!");
		return false;
	}
	return true;
}

// this converts the birthdate to an age (in years, rounded down)
// it is not precise and errs on the side of safety, sometimes
// requiring the DOB to be a month or more before the necessary date for an age.
function getAgeFromDates(then, now)
{
	var msPerYear = (1000 * 60 * 60 * 24 * 365);
	var difference = now.getTime() - then.getTime();
	return parseInt(difference / msPerYear);
}

// alternative form of getAge -- thanks to Matt Levy for his help with this function
function getAgeFromDates2(then, now)
{
        // this ws to handle a non y2k compliant bug in the getYear function.
        var nowYear  = now.getYear();
        var thenYear = then.getYear();
        if (thenYear < 100){thenYear = "19"+thenYear;}
        if (nowYear  < 100){nowYear  = "19"+nowYear;}

	var age = nowYear - thenYear;     // Upper bound on age
	if (now.getMonth() < then.getMonth()) {       // birthday hasn't happened yet
		age--;
	} else {
		if ( (now.getMonth() == then.getMonth()) && (now.getDay() < then.getDay()) ) { // birthday is this month
			age--;
		} 
	}
	return age+1;  //punting, trying to get this to work
}


function getAgeFromDates3(dob, nowx) 
{
	// http://developer.irt.org/script/29.htm
    var now = new Date();
    var today = new Date(now.getYear(),now.getMonth(),now.getDate());

    var yearNow = now.getYear();
    var monthNow = now.getMonth();
    var dateNow = now.getDate();

    var yearDob = dob.getYear();
    var monthDob = dob.getMonth();
    var dateDob = dob.getDate();

    yearAge = yearNow - yearDob;

    if (monthNow >= monthDob)
        var monthAge = monthNow - monthDob;
    else {
        yearAge--;
        var monthAge = 12 + monthNow - monthDob;
    }

    if (dateNow >= dateDob)
        var dateAge = dateNow - dateDob;
    else {
        monthAge--;
        var dateAge = 31 + dateNow - dateDob;

        if (monthAge < 0) {
            monthAge = 11;
            yearAge--; 
        }
    }

    return yearAge + ' years ' + monthAge + ' months ' + dateAge + ' days' + '(' + today + ')';
	//return yearAge;
}

function getDateFromField(checkField){
	var date = checkField.value;
	var month = date.substring(0,2);
	var day = date.substring(3,5);
	var year = date.substring(6,10);
	return new Date(year, month, day);
}

function checkValidMonthYear(checkField){
	var date = checkField.value;
	var month = date.substring(0,2);
	var year = date.substring(2,4);
	
	//alert(checkField.value+" "+month+" "+year);
	
	if (!isNumber(checkField.value))
	{
	    alert("The '"+getFieldName(checkField)+"' field format must be MMYY.\nPlease fix it to continue.");
        checkField.focus();
        return (false);
	}
	if (month < 01 || month > 12)
	{
		alert("The '"+getFieldName(checkField)+"' field must be a valid month.\nPlease fix it to continue.");
		checkField.focus();
		return false;
	}
	return true;
	
}
 

// this is a stub for a function previously found in a deprecated library.
function checkBday(checkField)
{
	if (!checkBirthdate(checkField, 13)){
		window.top.close();
	}
}

// check to see if an entered date is valid
// Must contain 0 in front of single digit months and days
// Must be 4 digit year
// Input: a string
// Output: if it is a valid date, then true. Otherwise, an error message
function checkDate(checkField)
{
	if(!checkField.value)
	{
		return true;
	}
	date = checkField.value;
	var length = date.length;
	var DayoftheMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	var day, month, year;

	// check date's format
	if (!isNumber(date) && (date.charAt(2) != '/' || date.charAt(5) != '/' || length != 10))
	{
	    alert("The '"+getFieldName(checkField)+"' field format must be MM/DD/YYYY.\nPlease fix it to continue.");
        checkField.focus();
        return (false);
	}
	else if (isNumber(date) && length != 8)
	{
	    alert("The '"+getFieldName(checkField)+"' field format must be MM/DD/YYYY.\nPlease fix it to continue.");
        checkField.focus();
        return (false);
	}

	if (!isNumber(date))
	{
		month = date.substring(0,2);
		day = date.substring(3,5);
		year = date.substring(6,10);
	}
	else
	{
		month = date.substring(0,2);
		day = date.substring(2,4);
		year = date.substring(4,8);
	}

	if (!isNumber(month) || !isNumber(day) || !isNumber(year))
	{
	    alert("The '"+getFieldName(checkField)+"' field format must be MM/DD/YYYY or MMDDYYYY.\nPlease fix it to continue.");
        checkField.focus();
        return (false);
	}
	else if (month < 0 || month > 12)
	{
	    alert("The '"+getFieldName(checkField)+"' field contains an Invalid Month.\n Please fix it to continue.");
        checkField.focus();
        return (false);
	}
	else if (month == "02" && ((isLeapYear(year) && day > 29) || (!isLeapYear(year) && day > 28)))
	{
	    alert("The '"+getFieldName(checkField)+"' field contains an Invalid day for the given Month.\n Please fix it to continue.");
        checkField.focus();
        return (false);
	}
	else if (month != 2 && day > DayoftheMonth[month-1])
	{
	    alert("The '"+getFieldName(checkField)+"' field contains an Invalid Month.\n Please fix it to continue.");
        checkField.focus();
        return (false);
	}
	return true;
}