var slider=function(){
	var array=[]; var speed=4; var timer=10;
	return{
		init:function(t,c){
			var s,ds,l,i,y;
			s=document.getElementById(t); ds=s.getElementsByTagName('div'); l=ds.length; i=y=0;
			for(i=0;i<l;i++){
				var d,did; d=ds[i]; did=d.id;
				if(did.indexOf("header")!=-1){
					y++; d.onclick=new Function("slider.process(this)");
				}else if(did.indexOf("content")!=-1){
					array.push(did.replace('-content','')); d.maxh=d.offsetHeight;
					if(c!=y){d.style.height='0px'; d.style.display='none'}
					else{d.style.display='block'}
				} 
			}
		},
		process:function(d){
			var cl,i; cl=array.length; i=0;
			for(i;i<cl;i++){
				var s,h,c,cd;
				s=array[i]; h=document.getElementById(s+'-header');
				c=s+'-content'; cd=document.getElementById(c); clearInterval(cd.timer);
				
				if(h==d&&cd.style.display=='none'){
					cd.style.display='block'; this.islide(c,1); h.className='accordianheader-open';
				}else if(cd.style.display=='block'){this.islide(c,-1);h.className='accordianheader'}
			}
		},
		islide:function(i,d){var c,m; c=document.getElementById(i); m=c.maxh; c.direction=d; c.timer=setInterval("slider.slide('"+i +"')",timer)},
		slide:function(i){
			var c,m,h,dist; c=document.getElementById(i); m=c.maxh; h=c.offsetHeight;
			dist=(c.direction==1)?Math.round((m-h)/speed):Math.round(h/speed);
			if(dist<=1){dist=1}
			c.style.height=h+(dist*c.direction)+'px'; c.style.opacity=h/c.maxh; c.style.filter='alpha(opacity='+(h*100/c.maxh)+')';
			if(h<2&&c.direction!=1){
				c.style.display='none'; clearInterval(c.timer);
			}else if(h>(m-2)&&c.direction==1){clearInterval(c.timer)}
		}
};}();



var write_element = '';				  	

//Gets the browser specific XmlHttpRequest Object
// *** ajax DOM test *** //
function GetXmlHttpObject()
{
	var xmlHttp=null;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	} catch (e) {
		 //Internet Explorer
		 try {
		  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		 } catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		 }
	}
	return xmlHttp;
}

function changeTab(tab)
{ 
	write_element = document.getElementById(tab+"_div");
	write_element.innerHTML = 'Initiating ...';

	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
	 alert ("Browser does not support HTTP Request")
	 return false;
	}
		
	var url ="/includes/home/ajax.php";
	var data = "tab=" + tab;
	data = data + "&ajaxid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged
	
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xmlHttp.send(data);
	return false;
}

function stateChanged() 
{ 
	
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		try{
			pageTracker._trackPageview("/index.php#"+write_element );
		} catch(err) {}
		write_element.innerHTML=xmlHttp.responseText 
	} else {
		write_element.innerHTML="Loading ... ";
	}
	return false;
}


function do_zw_signup(){
	write_element = document.getElementById('subscribeForm');
	
	var email = document.getElementById("email").value;
		
	if(!isValidEmail(email)){
		alert('Email address is invalid, please try again');
		return false;
	}
	
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
		alert ("Browser does not support HTTP Request")
		return false;
	}
		
	var url ="/includes/zooweekly_signup.inc.php?ajaxid="+Math.random();
	var data = "email=" + encodeURI( document.getElementById("email").value);
	data = data + "&zw_submit="+Math.random()
	
	xmlHttp.onreadystatechange=ZWstateChanged
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xmlHttp.send(data);
	return false;	
}

function ZWstateChanged() 
{ 
	
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		pageTracker._trackPageview("/index.php#zoo_weekly_signup" );
		write_element.innerHTML=xmlHttp.responseText+"<br>Visit <a href='https://www.myaustraliazoo.com.au' target='_blank'>MyAustraliaZoo</a> for more newsletter subscriptions.";
	} else {
		write_element.innerHTML="Loading ... ";
	}
	return false;
}