/*
--------------------------------
BGI Website JavaScript Functions
--------------------------------
*/

/**

Used to toggle between displaying or hiding submenu items.

elemId the id assigned to the element to display or hide

*/
function toggleDisplayBlockOrNone(elemId) {
	if(document.getElementById){
		var displayStyle = document.getElementById(elemId).style;
		if(displayStyle.display == "block"){
			displayStyle.display = "none";
			return "closed";
		}
		else{
			displayStyle.display = "block";
			return "open";
		}
	}
}

/**

Used to toggle open or close the product species submenu and saves the state of the menu for this session.

*/
function toggleOpenSubmenu(menuId) {
	var menuState = toggleDisplayBlockOrNone(menuId);
	if(menuState == "open"){
		SetCookie (menuId, "open");
	}
	else{
		SetCookie (menuId, "closed");
	}
	return false;
}

/**

Called when the page reloads;  by default the submenu is closed.

*/
function resetSubmenuState(menuId) {
	var menuState = GetCookie (menuId);
	if(menuState == "open"){
		toggleOpenSubmenu(menuId);
	}
}

//recipe link functions
var keepRecipeSubMenuOpen = false;

function recipeLinkMouseOver() {
	keepRecipeSubMenuOpen = true;
	recipeSubMenuOpen();
}

function recipeLinkMouseOut() {
	keepRecipeSubMenuOpen = false;
	setTimeout("recipeSubMenuClose()", 1000);
}

function recipeSubMenuMouseOver() {
	keepRecipeSubMenuOpen = true;
}

function recipeSubMenuMouseOut() {
	keepRecipeSubMenuOpen = false;
	setTimeout("recipeSubMenuClose()", 1000);
}

function recipeSubMenuClick() {
	keepRecipeSubMenuOpen = false;
	recipeSubMenuClose();
}

function recipeSubMenuOpen(){
	var displayStyle = document.getElementById("recipeSubmenu").style;
	if(displayStyle.display != "block"){
		displayStyle.display = "block";
	}
}

function recipeSubMenuClose() {
	if(keepRecipeSubMenuOpen == false){
		var displayStyle = document.getElementById("recipeSubmenu").style;
		if(displayStyle.display != "none"){
			displayStyle.display = "none";
		}
	}
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


// ---------------------------------------------------------------
//  Cookie Functions - Second Helping  (21-Jan-96)
//  Written by:  Bill Dortch, hIdaho Design <BDORTCH@NETW.COM>
//  The following functions are released to the public domain.
//
//  The Second Helping version of the cookie functions dispenses with
//  my encode and decode functions, in favor of JavaScript's new built-in
//  escape and unescape functions, which do more complete encoding, and
//  which are probably much faster.
//
//  The new version also extends the SetCookie function, though in
//  a backward-compatible manner, so if you used the First Helping of
//  cookie functions as they were written, you will not need to change any
//  code, unless you want to take advantage of the new capabilities.
//
//  The following changes were made to SetCookie:
//
//  1.  The expires parameter is now optional - that is, you can omit
//      it instead of passing it null to expire the cookie at the end
//      of the current session.
//
//  2.  An optional path parameter has been added.
//
//  3.  An optional domain parameter has been added.
//
//  4.  An optional secure parameter has been added.
//
//  For information on the significance of these parameters, and
//  and on cookies in general, please refer to the official cookie
//  spec, at:
//
//      http://www.netscape.com/newsref/std/cookie_spec.html    
//
//
// "Internal" function to return the decoded value of a cookie
//
function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

//
//  Function to return the value of the cookie specified by "name".
//    name - String object containing the cookie name.
//    returns - String object containing the cookie value, or null if
//      the cookie does not exist.
//
function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}

//
//  Function to create or update a cookie.
//    name - String object object containing the cookie name.
//    value - String object containing the cookie value.  May contain
//      any valid string characters.
//    [expires] - Date object containing the expiration data of the cookie.  If
//      omitted or null, expires the cookie at the end of the current session.
//    [path] - String object indicating the path for which the cookie is valid.
//      If omitted or null, uses the path of the calling document.
//    [domain] - String object indicating the domain for which the cookie is
//      valid.  If omitted or null, uses the domain of the calling document.
//    [secure] - Boolean (true/false) value indicating whether cookie transmission
//      requires a secure channel (HTTPS).  
//
//  The first two parameters are required.  The others, if supplied, must
//  be passed in the order listed above.  To omit an unused optional field,
//  use null as a place holder.  For example, to call SetCookie using name,
//  value and path, you would code:
//
//      SetCookie ("myCookieName", "myCookieValue", null, "/");
//
//  Note that trailing omitted parameters do not require a placeholder.
//
//  To set a secure cookie for path "/myPath", that expires after the
//  current session, you might code:
//
//      SetCookie (myCookieVar, cookieValueVar, null, "/myPath", null, true);
//
function SetCookie (name, value) {
  var argv = SetCookie.arguments;
  var argc = SetCookie.arguments.length;
  var expires = (argc > 2) ? argv[2] : null;
  var path = (argc > 3) ? argv[3] : null;
  var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
  document.cookie = name + "=" + escape (value) +
    ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
    ((path == null) ? "" : ("; path=" + path)) +
    ((domain == null) ? "" : ("; domain=" + domain)) +
    ((secure == true) ? "; secure" : "");
}

//  Function to delete a cookie. (Sets expiration date to current date/time)
//    name - String object containing the cookie name
//
function DeleteCookie (name) {
  var exp = new Date();
  exp.setTime (exp.getTime() - 1);  // This cookie is history
  var cval = GetCookie (name);
  document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}