// define whitespace characters
var whitespace = " \t\n\r";

/****************************************************************/
//	IMAGE BEHAVIORS
/****************************************************************/

/****************************************************************/
/*	PURPOSE:  Swap an image onMouseOver or onMouseOut.
	imgName: NAME attribute of an IMG tag to be swapped.
	sSrc: string path to the image to become the image source.
*/
function swapImage(imgName, sSrc)
{
	if(document.images){
		var objImg = eval(document.images[imgName])
		objImg.src = sSrc;
	}
}

/*	PURPOSE:  Returns the DOM object with name provided
	theObj: ID of object to find
	theDoc: ignore.  This is for backward compatability
	Example: obj = findObj("image1");	
*/
function findObj(theObj, theDoc)
{
  var p, i, foundObj;
  
  if(!theDoc) theDoc = document;
  if( (p = theObj.indexOf("?")) > 0 && parent.frames.length)
  {
    theDoc = parent.frames[theObj.substring(p+1)].document;
    theObj = theObj.substring(0,p);
  }
  if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
  for (i=0; !foundObj && i < theDoc.forms.length; i++) 
    foundObj = theDoc.forms[i][theObj];
  for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
    foundObj = findObj(theObj,theDoc.layers[i].document);
  if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj);
  
  return foundObj;
}
/*
	PURPOSE:  To show or hide a layer/div with a unique id
	Accepts a variable number of arguments, in triplets as follows:
	arg 1: simple name of a layer object, such as "Layer1"
	arg 2: ignored (for backward compatibility)
	arg 3: 'hide' or 'show'
	repeat...
	Example: showHideLayers(Layer1,'','show',Layer2,'','hide');
*/
function showHideLayers()
{ 
  var i, visStr, obj, args = showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3)
  {
    if ((obj = findObj(args[i])) != null)
    {
      visStr = args[i+2];
      if (obj.style)
      {
        obj = obj.style;
        if(visStr == 'show') visStr = 'visible';
        else if(visStr == 'hide') visStr = 'hidden';
      }
      obj.visibility = visStr;
    }
  }
}

/****************************************************************/
//	HELPER  and VALIDATION FUNCTIONS
/****************************************************************/

// Purpose: Sets the current page of a popup's parent window.
// Parameters: 
//				url = The URL to send the parent to
//				closeSelf = close the popup or calling window; true or false
function parentToURL(url, closeSelf){
	// detect Safari--it doesn't support window.opener.location
	var agent = new String(navigator.userAgent);
	var isSafari = agent.indexOf("Safari");
	if(isSafari == -1){isSafari = false;}
	else{isSafari = true;}
	// if: opener exists, is from 'main' window, opener not closed, and not Safari
	if((window.opener && !window.opener.closed) && (window.opener.name =='main') && !isSafari){
		window.opener.location.href = url;
		if(closeSelf){
			window.self.close();
		}
		window.opener.focus();
	}
	else{
		window.self.location.href = url;
	}
}

// Purpose: To open a popup window and define the parent and child windows.
// Parameters: 
//				url = the URL to open in the popup window
//				features = the window features for the popup (e.g. 'height=604, width=720, toolbar=no'
function popup(url, windowParameters){
	self.name = "opener";
	popup = window.open(url, 'popup', windowParameters);
	popup.focus();
}

// Purpose: centers the window according to the resolution of the users screen.
// Parameters: 
//				browserWidth =  the total desired width of the browser window.
//				browserHeight = the total desired height of the browser window.
function centerWin(browserWidth, browserHeight){
	self.resizeTo(browserWidth, browserHeight)
	var screenWidth = window.screen.availWidth;
	var screenHeight = window.screen.availHeight;
	var browsTop = Math.round(screenHeight/2) - Math.round((parseInt(browserHeight)/2));
	var browsLeft = Math.round(screenWidth/2) - Math.round((parseInt(browserWidth)/2));
	self.moveTo(browsLeft, browsTop);
}

function cameFromGettyDomain(){
	// returns true if "gettyimages" is in the referring URL
	// returns false if not.
	var strReferringURL = new String(document.referrer);
	var myRegExp = new RegExp("gettyimages", "gi");
	var intResult = strReferringURL.search(myRegExp);
	if(intResult >= 0){return true;}
	else{return false;}
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"
function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}
// returns a random number between the given low and high integers
function generateRandomInteger(low, high){
	var iMin = parseInt(low);
	var iMax = parseInt(high);
	var iReturn = (Math.random() * (iMax - iMin)) + iMin;
	return Math.round(iReturn);
}
/****************************************************************/
// PURPOSE:  Check to see if the string passed in is a valid time.
//	A valid time is defined as a string which is postfixed with either
//  "PM" or "AM".  Next it checks to see if there is a colon in the
//  string.  If there is, it makes sure that at least one digit preceeds
//  it and two proceed it.

function IsTime(strTime)
{
	var strTestTime = new String(strTime);
	strTestTime.toUpperCase();

	var bolTime = false;

	if (strTestTime.indexOf("PM",1) != -1 || strTestTime.indexOf("AM",1))
		bolTime = true;

	if (bolTime && strTestTime.indexOf(":",0) == 0)
		bolTime = false;

	var nColonPlace = strTestTime.indexOf(":",1);
	if (bolTime && ((parseInt(nColonPlace) + 5) < (strTestTime.length - 1) || (parseInt(nColonPlace) + 4) > (strTestTime.length - 1)))
		bolTime = false;
	return bolTime;
}

/****************************************************************/

function replaceAll (s, fromStr, toStr)
{
	var new_s = s;
	for (i = 0; i < 100 && new_s.indexOf (fromStr) != -1; i++)
	{
		new_s = new_s.replace (fromStr, toStr);
	}
	return new_s;
}

/****************************************************************/
/* PURPOSE:  Since we are using the single tick mark as the
	string delimiter to construct our SQL queries, a string with
	a tick mark in it will cause a SQL error.  Therefore we replace
	all "'" with "''", which eliminates the possibility of a SQL error.
*/

function sqlSafe (s)
{
	var new_s = s;
	new_s = replaceAll (new_s, "'", "|");
	new_s = replaceAll (new_s, "|", "''");
	new_s = replaceAll (new_s, "\"", "|");
	new_s = replaceAll (new_s, "|", "''");
	return new_s;
}

/****************************************************************/
function makeSafe (i)
{
	i.value = sqlSafe (i.value);
}

/****************************************************************/
// Check whether string s is empty.

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

/****************************************************************/
// Returns true if string s is empty or 
// whitespace characters only.

function isWhitespace (s)

{   var i;

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

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
	// Check that current character isn't whitespace.
	var c = s.charAt(i);

	if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}

/****************************************************************/
// isEmail (STRING s [, BOOLEAN emptyOK])
// 
// Email address must be of form a@b.c ... in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isEmail (s)
{   if (isEmpty(s)) 
       //if (isEmail.arguments.length == 1) return defaultEmptyOK;
	   if (isEmail.arguments.length == 1) return false;
       else return (isEmail.arguments[1] == true);
   
    // is s whitespace?
    if (isWhitespace(s)) return false;
    
    // there must be >= 1 character before @, so we
    // 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;
}

/****************************************************************/
// Checks to see if a required field is blank.  If it is, a warning
// message is displayed...

function ForceEntry(objField, FieldName)
{
	var strField = new String(objField.value);
	if (isWhitespace(strField)) {
		alert("Please enter information for " + FieldName);
		objField.focus();
		objField.select();
		return false;
	}

	return true;
}

/****************************************************************/
// Checks to see if a field is contains a valid number.  
// Returns a boolean.  True for number, false for other.

function isNumber(str)
{
	var strField = new String(str);
	if (isWhitespace(strField)) return false;
	var i = 0;
	for (i = 0; i < strField.length; i++)
		if (strField.charAt(i) < '0' || strField.charAt(i) > '9') {
			return false;
		}
	return true;
}

	
/****************************************************************/
// Returns true if the string passed in is a valid number
//  (no alpha characters), else it displays an error message

function ForceNumber(objField, FieldName)
{
	var strField = new String(objField.value);
	
	if (isWhitespace(strField)) return true;

	var i = 0;

	for (i = 0; i < strField.length; i++)
		if (strField.charAt(i) < '0' || strField.charAt(i) > '9') {
			alert(FieldName + " must be a valid numeric entry.  Please do not use commas or dollar signs or any non-numeric symbols.");
			objField.focus();
			return false;
		}

	return true;
}

/****************************************************************/
// Returns true if the string passed in is a valid money
//  (no alpha characters except a decimal place), 
//   else it displays an error message

function ForceMoney(objField, FieldName)
{
	var strField = new String(objField.value);
	
	if (isWhitespace(strField)) return true;

	var i = 0;

	for (i = 0; i < strField.length; i++)
		if ((strField.charAt(i) < '0' || strField.charAt(i) > '9') && (strField.charAt(i) != '.')) {
			alert(FieldName + " must be a valid numeric entry.  Please do not use commas or dollar signs or any non-numeric symbols.");
			objField.focus();
			return false;
		}

	return true;
}


/****************************************************************/
// Right trims the string...  Useful for SQL datatypes of CHAR

function RTrim(strTrim)
{
	var str = new String(strTrim);
	var i = 0;
	var c = "";
	var endpos = 0

	for (i = str.length; i >= 0 && endpos == 0; i = i - 1) {
		c = str.charAt(i);
		if (whitespace.indexOf(c) == -1)
			endpos = i;
	}

	return str.substring(0,endpos+1);
}

/****************************************************************/
/* PURPOSE:  Returns true if the string is a valid date number.
	A method is passed in (1 = month, 2 = day).  If the string is
	nonnumeric, false is passed back.  If the day in the date string
	is greater than 31, false is returned.  If the month is greater
	than 12, an error is returned.
*/

function isDateNumber(strNum,method)
{
	var str = new String(strNum);
	var i = 0;

	if (isNaN(parseInt(str)) || parseInt(str) < 0) return false;

	if (method == 2)
		if (parseInt(str) > 31)
			return false;
	if (method == 1)
		if (parseInt(str) > 12)
			return false;

	for (i = 0; i < str.length; i++)
		if (str.charAt(i) < '0' || str.charAt(i) > '9')
			return false;


	return true;
}

/****************************************************************/
// Displays an alert box with the passed in string...

function PromptErrorMsg(Field,strError)
{
	alert("You have entered an invalid date for " + strError + ".  Please make sure your date format is in M/D/Y format.");
	Field.focus();
}

/****************************************************************/
/* PURPOSE: Checks to see if the string is a valid date.  A valid
	date is defined as any of the following:

		MM/DD/YY, MM/DD/YYYY, M/D/YY, M/D/YYYY,
		MM-DD-YY, MM-DD-YYYY, M-D-YY, M-D-YYYY
*/

function ForceDate(strDate,strField)
{
	var str = new String(strDate.value);

	if (isWhitespace(str)) {
		return true;
		// if the field is empty, just return true...
	}

	var i = 0, count = str.length, j = 0;
	while ((str.charAt(i) != "/" && str.charAt(i) != "-") && i < count)
		i++;

	if (i == count || i > 2) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	var addOne = false;
	if (i == 2) addOne = true;

	if (!isDateNumber(str.substring(0,i),1)) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	j = i+1;
	i = 0;

	while ((str.charAt(i+j) != "/" && str.charAt(j+i) != "-") && i+j < count)
		i++;

	if (i+j == count || i > 2) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	if (!isDateNumber(str.substring(j,i+j),2)) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	j = i+3;
	i = 0;

	if (addOne) j++;

	while (i+j < count)
		i++;


	if (i != 2 && i != 4) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	if (!isDateNumber(str.substring(j,i+j),3)) {
		PromptErrorMsg(strDate,strField);
		return false;
	}

	return true;
}

/****************************************************************/
// This function determines if the string passed in is a valid
// US zip code.  It accepts either ##### or #####-####.  If the
// string is valid, it returns true, else false.

function isZipcode(strZip)
{
	var s = new String(strZip);

	if (s.length != 5 && s.length != 10)
		// inappropriate length
		return false;


	for (var i=0; i < s.length; i++)
		if ((s.charAt(i) < '0' || s.charAt(s) > '9') && s.charAt(i) != '-')
			return false;

	return true;
}

/****************************************************************/
// This function ensures that a field is less than or equal to the
// Length passed in.  You must call this function with the element
// name in your form (for example: "ForceLength(document.forms[0].txtElement)"
// as opposed to "ForceLength(document.forms[0].txtElement.value)"
// If the field's value is too large, an error message is displayed
// and false is returned, else true is returned.

function ForceLength(objField, nLength, strWarning)
{
	var strField = new String(objField.value);

	if (strField.length > nLength) {
		alert(strWarning);
		return false;
	} else
		return true;
}

function isANumber(elemName,elemValue,formElem){
	if (isNaN(elemValue))
		{
		alert('Please use a whole number for the '+elemName);
		formElem.select();
		formElem.focus();
		}
}

function parseNumber(str){
	var myRegExp = new RegExp(/[^0-9]/gi);
	return str.replace(myRegExp,"");
}