/*
-----------------------------------------------
Northpoint Church
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Description:	Generic scrips and functions
Filename:		northpoint.jsLib.js
Date:			5 March 2007
Updated:		5 March 2007
----------------------------------------------- */

/*	-------------------------------------------------------------
	function getBrowserWidth()
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	Description:	As odd as it may seem, this function returns
					the browser's width in pixels.
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	Credits:		Script found on Particle Tree
					http://www.particletree.com
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		<!--
		function getBrowserWidth(){
			if (window.innerWidth){
				return window.innerWidth;}	
			else if (document.documentElement && document.documentElement.clientWidth != 0){
				return document.documentElement.clientWidth;	}
			else if (document.body){return document.body.clientWidth;}		
				return 0;
		}
		//-->

/*	-------------------------------------------------------------
	function determineStyle()
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	Description:	With this here function we can swap styles.
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	Credits:		Script found on A List Apart
					http://www.alistapart.com
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		<!--
		function determineStyle(){
			
			var browserWidth = getBrowserWidth();
				
			var i, a, main;
			
			if (browserWidth <= 965){
				for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
					if(a.getAttribute("rel").indexOf("style") != -1
					&& a.getAttribute("title")) {
						a.disabled = true;
						if(a.getAttribute("title") == "narrow") a.disabled = false;
					}
				}
			}
			
			if (browserWidth > 965){
				for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
					if(a.getAttribute("rel").indexOf("style") != -1
					&& a.getAttribute("title")) {
						a.disabled = true;
						if(a.getAttribute("title") == "wide") a.disabled = false;
					}
				}
			}
		}
		//-->

/*	-------------------------------------------------------------
	function setLinkAttributes()
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	Description:	setLinkAttributes finds ALL anchor links and
					can set new attributes. The following script
					specifically finds anchor links labeled as
					external, and add a terget="_blank". We do
					in order to validate in XHTML 1.1 Strict.
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	Credits:		Script found on Site Point (I think)
					http://www.sitepoint.com
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		<!--
		function setLinkAttributes(switchLinks) {
			if (switchLinks == "true") {
				if (!document.getElementsByTagName) return;
				var anchors = document.getElementsByTagName("a");
					for (var i=0; i<anchors.length; i++) {
					var anchor = anchors[i];
					
					//if (anchor.getAttribute("href") && ( anchor.getAttribute("rel") == "external" || anchor.getAttribute("rel") == "nofollow" ) ) {
					//	anchor.target = "_blank";
					//}
					
					if (anchor.getAttribute("href") && ( anchor.getAttribute("rel") == "external" ) ) {
						anchor.target = "_blank";
					}
				}
			} else {
				if (!document.getElementsByTagName) return;
				var anchors = document.getElementsByTagName("a");
					for (var i=0; i<anchors.length; i++) {
					var anchor = anchors[i];
					
					if (anchor.getAttribute("href") && ( anchor.getAttribute("rel") == "external" || anchor.getAttribute("rel") == "nofollow" ) ) {
						anchor.target = "_self";
					}
				}
			}
		}
		
		function toggleLinkAttributes() {
			var ExpireLongTerm = new Date();
			var ExpireLongTermValue = new Date(ExpireLongTerm.getTime()+(1000 * 60 * 60 * 360000));
			
			if ( getCookie("externalLinks") == "true" ) {
				setLinkAttributes("false");
				setCookie("externalLinks","false",ExpireLongTermValue);
			} else if (getCookie("externalLinks") == "false") {
				setLinkAttributes("true");
				setCookie("externalLinks","true",ExpireLongTermValue);
			} else if ( !getCookie("externalLinks") ) {
				setLinkAttributes("true");
				setCookie("externalLinks","true",ExpireLongTermValue);
			}
		}
		//-->
	
	
/*	-------------------------------------------------------------
	function toTop()
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	Description:	This little functions performs a smooth
					scroll from the bottom to the top of the
					page.
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		<!--
		var g_USER_AGENT = getAgent();
		
		// return NN4, NN5(Netscape 6+, Mozilla 1+?), IE4, IE5(IE5+), Unknown
		function getAgent(){
		  var userAgent = navigator.userAgent;
		  var charIndex;
		  var majorVersion;
		
		  charIndex = userAgent.indexOf("MSIE");
		  if(charIndex){
			majorVersion = userAgent.charAt(charIndex + 4 + 1);
			if(majorVersion > 4){
			  return("IE5");
			}
			else if(majorVersion == 4){
			  return("IE4");
			}
		  }
		
		  charIndex = userAgent.indexOf("Mozilla");
		  majorVersion = userAgent.charAt(charIndex + 7 + 1);
		  if(majorVersion > 4){
			return("NN5");
		  }
		  else if(majorVersion == 4){
			return("NN4");
		  }
		
		  return("Unknown");
		}
		/* USER_AGENT check end -------------------------------------------------- */
		
		function getWindowYOffset(){
		  if(g_USER_AGENT == "IE5" || g_USER_AGENT == "IE4"){
			return document.body.scrollTop;
		  }else if(g_USER_AGENT == "NN5" || g_USER_AGENT == "NN4"){
			return window.pageYOffset;
		  }else{
			return 0;
		  }
		}
		
		var waitTimer;
		function jumpTo(dstY, srcY, scrollRate, waitMillSec) {
		  if(waitTimer){
			clearTimeout(waitTimer);
		  }
		  if( ! dstY || dstY < 0 ){
			dstY = 0;
		  }
		  if( ! srcY ){
			srcY = 0 + getWindowYOffset();
		  }
		  if( ! scrollRate ){
			scrollRate = 5;
		  }
		  if( ! waitMillSec ){
			waitMillSec = 20;
		  }
		
		  srcY += (dstY - getWindowYOffset()) / scrollRate;
		  if(srcY < 0){
			srcY = 0;
		  }
		  posY = Math.floor(srcY);
		  window.scrollTo(0, posY);
		
		  if(posY != dstY){
			waitTimer = setTimeout("jumpTo("+ dstY +", "+ srcY +", "+ scrollRate +", "+ waitMillSec +")", waitMillSec);
		  }
		  else if(posY == dstY){
			clearTimeout(waitTimer);
		  }
		  else if(posY < 1){
			window.scroll(0, 0);
		  }
		}
		
		function toTop(){
		  jumpTo(0, 0, 7, 14);
		}
		//-->


	<!-- 
		function doOnResize () {
			determineStyle();
			setTall();
		}
		
		function doOnLoad () {
			determineStyle();
			//if ( getCookie("externalLinks") ) {
			//	setLinkAttributes( getCookie("externalLinks") );
			//}
			setTall();
			setLinkAttributes("true");
		}
			
	//-->
	
	function toggleDisplay(elem){
		el = document.getElementById(elem);
		if (el.style.display == 'block'){
			el.style.display = 'none';
		} else {
			el.style.display = 'block';
		}
	}

/*	-------------------------------------------------------------
	function tabcontentIDs()
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	Description:	This script is handles the tabbed divs
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	Credits:		Script found on Dynamic Drive DHTML
					http://www.dynamicdrive.com
					Last updated: Nov 8th, 06
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	var enabletabpersistence=1 //enable tab persistence via session only cookies, so selected tab is remembered?
	
	////NO NEED TO EDIT BELOW////////////////////////
	var tabcontentIDs=new Object()
	
	function expandcontent(linkobj){
	var ulid=linkobj.parentNode.parentNode.id //id of UL element
	var ullist=document.getElementById(ulid).getElementsByTagName("li") //get list of LIs corresponding to the tab contents
	for (var i=0; i<ullist.length; i++){
	ullist[i].className=""  //deselect all tabs
	if (typeof tabcontentIDs[ulid][i]!="undefined") //if tab content within this array index exists (exception: More tabs than there are tab contents)
	document.getElementById(tabcontentIDs[ulid][i]).style.display="none" //hide all tab contents
	}
	linkobj.parentNode.className="selected"  //highlight currently clicked on tab
	var divToShow = document.getElementById(linkobj.getAttribute("rel"));
	divToShow.style.display = "block" //expand corresponding tab content
	
///	alert( divToShow.getElementsByTagName( "div" )[0].style.display );//.display="block";
	
	saveselectedtabcontentid(ulid, linkobj.getAttribute("rel"))
	}
	
	function expandtab(tabcontentid, tabnumber){ //interface for selecting a tab (plus expand corresponding content)
	var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber]
	if (thetab.getAttribute("rel"))
	expandcontent(thetab)
	}
	
	function savetabcontentids(ulid, relattribute){// save ids of tab content divs
	if (typeof tabcontentIDs[ulid]=="undefined") //if this array doesn't exist yet
	tabcontentIDs[ulid]=new Array()
	tabcontentIDs[ulid][tabcontentIDs[ulid].length]=relattribute
	}
	
	function saveselectedtabcontentid(ulid, selectedtabid){ //set id of clicked on tab as selected tab id & enter into cookie
	if (enabletabpersistence==1) //if persistence feature turned on
	setCookie(ulid, selectedtabid)
	}
	
	function getullistlinkbyId(ulid, tabcontentid){ //returns a tab link based on the ID of the associated tab content
	var ullist=document.getElementById(ulid).getElementsByTagName("li")
	for (var i=0; i<ullist.length; i++){
	if (ullist[i].getElementsByTagName("a")[0].getAttribute("rel")==tabcontentid){
	return ullist[i].getElementsByTagName("a")[0]
	break
	}
	}
	}
	
	function initializetabcontent(){
	for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
	if (enabletabpersistence==0 && getCookie(arguments[i])!="") //clean up cookie if persist=off
	setCookie(arguments[i], "")
	var clickedontab=getCookie(arguments[i]) //retrieve ID of last clicked on tab from cookie, if any
	var ulobj=document.getElementById(arguments[i])
	var ulist=ulobj.getElementsByTagName("li") //array containing the LI elements within UL
	for (var x=0; x<ulist.length; x++){ //loop through each LI element
	var ulistlink=ulist[x].getElementsByTagName("a")[0]
	if (ulistlink.getAttribute("rel")){
	savetabcontentids(arguments[i], ulistlink.getAttribute("rel")) //save id of each tab content as loop runs
	ulistlink.onclick=function(){
	expandcontent(this)
	return false
	}
	if (ulist[x].className=="selected" && clickedontab=="") //if a tab is set to be selected by default
	expandcontent(ulistlink) //auto load currenly selected tab content
	}
	} //end inner for loop
	if (clickedontab!=""){ //if a tab has been previously clicked on per the cookie value
	var culistlink=getullistlinkbyId(arguments[i], clickedontab)
	if (typeof culistlink!="undefined") //if match found between tabcontent id and rel attribute value
	expandcontent(culistlink) //auto load currenly selected tab content
	else //else if no match found between tabcontent id and rel attribute value (cookie mis-association)
	expandcontent(ulist[0].getElementsByTagName("a")[0]) //just auto load first tab instead
	}
	} //end outer for loop
	}
	
	
	function getCookie(Name){ 
	var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
	if (document.cookie.match(re)) //if cookie found
	return document.cookie.match(re)[0].split("=")[1] //return its value
	return ""
	}
	
	function setCookie(name, value){
	document.cookie = name+"="+value //cookie value is domain wide (path=/)
	}

//// SHOW A HIDDEN LAYER ////

function toggleLayer(theshown,thehidden,thehidden2,signup,thestyle)
{
	var d = document;

	if (!thestyle)
	{
		thestyle = 'block';
	}
	
	if (theshown!='')
	{
		if (d.getElementById(theshown).style.display=='none' || (d.getElementById(theshown).style.display == '' && thestyle != 'table-row'))
		{
			if (thestyle == 'table-row')
			{
                d.getElementById(theshown).style.display = '';			    
			}
			else
			{
                d.getElementById(theshown).style.display = thestyle;   
			}
		}
		else
		{
			if (!signup)
			{
				d.getElementById(theshown).style.display = 'none';
			}
		}
	}
	
	if (thehidden)
	{
		d.getElementById(thehidden).style.display = 'none';
	}
	
	return false;

	if (thehidden2)
	{
		d.getElementById(thehidden2).style.display = 'none';
	}
}

function toggleLayerSimple (element, style)
{
    var e = document.getElementById(element);
    
    if( !style )
    {
        style = '';
    }
    
    if( e )
    {
        if( e.style.display == 'none' ) 
            e.style.display = style;
        else
            e.style.display = 'none';
    }
}