// ega.js: shared JavaScript for EGA web site

// root path for web site
var rootpath = "/";
// var rootpath = "/ega/"; 	// for test server

// -----------------------------------------------------------------------------------
// BrowserCheck Object
// provides most commonly needed browser checking variables
// 19990326
// Copyright (C) 1999 Dan Steinman
// Distributed under the terms of the GNU Library General Public License
// Available at http://www.dansteinman.com/dynapi/
function BrowserCheck() {
    var agt=navigator.userAgent.toLowerCase(); 
	var b = navigator.appName
	if (b=="Netscape") this.b = "ns"
	else if (b=="Microsoft Internet Explorer") this.b = "ie"
	else this.b = b
	this.v = parseInt(navigator.appVersion)
    this.mac = (agt.indexOf("mac")!=-1);
	this.win = (agt.indexOf("win")!=-1);
    this.ns = (this.b=="ns" && this.v>=4)
	this.ns4 = (this.b=="ns" && this.v==4)
	this.ns5 = (this.b=="ns" && this.v==5)
	this.ie = (this.b=="ie" && this.v>=4)
	this.ie4 = (navigator.userAgent.indexOf('MSIE 4')>0)
	this.ie5 = (navigator.userAgent.indexOf('MSIE 5')>0)
	this.ie55 = (navigator.userAgent.indexOf('MSIE 5.5')>0)
	if (this.ie5) this.v = 5
	this.min = (this.ns||this.ie); // this.ie && this.win;
}

// automatically create the "is" object
var is = new BrowserCheck()
// end BrowserCheck Object;
// -----------------------------------------------------------------------------------

// Functions from Fireworks to handle rollovers

// function that displays status bar message
var showMsg = navigator.userAgent != "Mozilla/4.0 (compatible; MSIE 4.0; Mac_PowerPC)";

function di(id,name){
  if (document.images) {document.images[id].src=eval(name+".src"); }
}

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_findObj(n, d) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_nbGroup(event, grpName) { //v3.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : args[i+1];
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    if ((nbArr = document[grpName]) != null)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = args[i+1];
      nbArr[nbArr.length] = img;
  } }
}

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_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];}
}

function MM_swapImagePerm() { //v3.0
  var i,x,a=MM_swapImagePerm.arguments; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){ x.src=a[i+2];}
}

// function to hide mailto links from spam bots
function writeMailto(address, domain)
{
	emailE=(address + '@' + domain);
	document.write('<a href="mailto:' + emailE + '">' + emailE + '</a>');
}


// selects or deselects a set of checkboxes based on the current value of the "select all" checkbox
function selectAll(formname, key, numvalues, newvalue)
{
	for (i = 0; i < numvalues; ++i)
	{
		eval("document." + formname + "." + key + i + ".checked = " + (newvalue ? "true": "false"));
	}
	return false;
}


// simple script to modify navigation bar to show arrow above section name in nav bar

var sections = ["about", "news", "resources", "funders", "ngos", "retreat", "events", "members", "co-op"];

function checkSection(i, section)
{
	if (document.location.href.indexOf("/" + section + "/") > -1)
  	{ 
		if (section == "co-op") {
			section = "coop";
		}
  		MM_swapImagePerm("nav_" + section, rootpath + "images/nav_" + section + "_f3.gif", rootpath + "images/nav_" + section + "_f3.gif");
		return true;
	}
	return false;
}

function setNav()
{
	for (var i = 0; i < sections.length; ++i)
	{
		if (checkSection(i+1, sections[i]))
			return;
	}
}


// returns value of specified cookie
function getCookieValue(cName)
{
	var result = null;
	var pValue;
	var myCookie = " " + document.cookie + ";";
	var searchName = " " + cName + "=";
	var cStart = myCookie.indexOf(searchName);
	var cEnd;

	if (cStart != -1)
	{
		cStart += searchName.length;
		cEnd = myCookie.indexOf(";", cStart);
		result = unescape(myCookie.substring(cStart, cEnd));

		return result;
	}

	return "";
}

function getIntCookie(cName, defaultValue)
{
	var value = getCookieValue(cName);
	return (value.length > 0 ? parseInt(value) : defaultValue);
}

// sets value of the specified cookie
function setCookieValue(cName, value)
{
	var cookieStr = value;
	var expDate = new Date();
	var oneYear = 12 * 31 * 24 * 60 * 60 * 1000;

	expDate.setTime(expDate.getTime() + oneYear);

	cookieStr += "; expires=" + expDate.toGMTString();
	cookieStr += "; path=/";

	document.cookie = cName + "=" + cookieStr;
}

// use this event handler on text input fields to limit their size.  use onkeypress
function limitWords(event, textField, maxWords)
{
	// always allow: backspace = 8, delete = 46
	// delete key doesn't generate a keypress event on some browsers
	if (event.keyCode == 8 || event.keyCode == 46) {
		return true;
	}
	
	var inputStr = textField.value;
	var inputWords = inputStr.split(/\s+/g);
	if (inputWords.length > maxWords) {
		return false;
	}
	return true;
}

// should be called by the onLoad handler
function egaInit()
{
   MM_preloadImages(rootpath + 'images/nav_home_f2.gif',rootpath + 'images/nav_about_f2.gif',rootpath + 'images/nav_news_f2.gif',rootpath + 'images/nav_resources_f2.gif',rootpath + 'images/nav_funders_f2.gif',rootpath + 'images/nav_ngo_f2.gif',rootpath + 'images/nav_events_f2.gif',rootpath + 'images/nav_members_f2.gif');
 	
	setNav();
}