b_versao = parseInt(navigator.appVersion);
var win = null;
var digits = "0123456789";
var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
var blanks = " \t\n\r";  // aka whitespace chars

function NovaJanela(mypage,myname,w,h,scroll)
{
if (b_versao >= 4)
	{
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	}
else
	{
	LeftPosition = 100
	TopPosition = 100
	}

settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable=no';
win = window.open(mypage,myname,settings);
win.window.focus()
}
function JanelaBoleto(mypage,myname,w,h,menu,scroll)
{
if (b_versao >= 4)
	{
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	}
else
	{
	LeftPosition = 100
	TopPosition = 100
	}

settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',menubar='+menu+',scrollbars='+scroll+',resizable=no';
win = window.open(mypage,myname,settings);
win.window.focus()
}

function isLetter(c)
  {
  return (((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")));
  }


// Returns true if character c is a digit (0 .. 9)

function isDigit(c)
  {
  return ((c >= "0") && (c <= "9"));
  }
function isInteger(s)
{
  if (isBlank(s))
    return false;

  // skip leading + or -
  if ((s.charAt(0) == "-") || (s.charAt(0) == "+"))
    var i = 1;
  else
    var i = 0;

  // Search through string's chars one by one until we find a 
  // non-numeric char, then return false; if we don't, return true
  for (i; i<s.length; i++)
    {   
    // Check that current character is number
    var c = s.charAt(i);
    if (!isDigit(c)) 
      return false;
    }
  // All characters are numbers
  return true;
}

function isAlphabetic(s)
  {
  var i;

  if (isBlank(s)) 
     return false;

  // Search through string's chars one by one until we find a 
  // non-alphabetic char, then return false; if we don't, return true

  for (i = 0; i < s.length; i++)
  {   
  // Check that current character is letter
  var c = s.charAt(i);

  if (!isLetter(c))
    return false;
  }

  // All characters are letters
  return true;
  }


function isEmpty(s)
{
  return ((s == null) || (s.length == 0));
}


// Returns true if string s is empty or all blank chars

function isBlank(s)
{
  var i;

  // Is s empty?
  if (isEmpty(s))
    return true;

  // Search through string's chars one by one until we find first
  // non-blank char, then return false; if we don't, return true
  for (i=0; i<s.length; i++)
    {   
    // Check that current character isn't blank
    var c = s.charAt(i);
    if (blanks.indexOf(c) == -1) 
      return false;
    }
  // All characters are blank
  return true;
}



function isEmail(s)
{ 
  if (isBlank(s)) 
    return false;
  
  // there must be >= 1 character before @, so we start
  // start looking at character position 1 (i.e. second character)
  var i = 1;
  var sLength = s.length;

  // look for @
  while ((i < sLength) && (s.charAt(i) != "@"))
    i++

  if ((i >= sLength) || (s.charAt(i) != "@")) 
    return false;
  else 
    i += 2;

  // look for .
  while ((i < sLength) && (s.charAt(i) != "."))
    i++

  // there must be at least one character after the .
  if ((i >= sLength - 1) || (s.charAt(i) != ".")) 
    return false;
  else 
    return true;
}