var d = window.document;
function getE( v ) 
{
    e = false;
    if ( d.getElementById ) 
    {	
    	e = d.getElementById( v );
    }
    else if ( d.all ) 
    {
    	e = d.all[ v ];
    }
    return e;
}
         
function countdown(instance,target)
{
	var Today = new Date();  
	var Todays_Date = new Date(Today.toGMTString());
	var Target_Date = new Date(target);
	
	//Find their difference, and convert that into seconds.                  
	var Time_Left = Math.round((Target_Date - Todays_Date) / 1000);
	
	if(Time_Left < 0)
	   Time_Left = 0;
	
	var thisCountDown = getE('countdown' + instance);
	thisCountDown.innerHTML = Math.floor(Time_Left / 60) + ":" + (Time_Left % 60).toFixed().pad(2, "0");
	      
	//Recursive call, keeps the clock ticking.
	if(Time_Left > 0)
		setTimeout('countdown('+instance+',\''+target+'\');',1000);
	else
	   checkOnProduct(instance); //call AJAX
}

function individualCountdown(target)
{
	Today = new Date();  
	Todays_Date = new Date(Today.toGMTString());
	Target_Date = target;
	
	//Find their difference, and convert that into seconds.                  
	var Time_Left = Math.round((Target_Date - Todays_Date) / 1000);
	
	if(Time_Left < 0)
	   Time_Left = 0;
	
	var thisCountDown = getE('countdown');
	thisCountDown.innerHTML = Math.floor(Time_Left / 60) + ":" + (Time_Left % 60).toFixed().pad(2, "0") ;
	
	//Recursive call, keeps the clock ticking.
	if(Time_Left > 0)
		setTimeout('individualCountdown(Target_Date);',1000);
	else
		window.location='/timeout.php';
}

function getHTTPObject() 
	{ //http://www.webpasties.com/xmlHttpRequest/xmlHttpRequest_tutorial_1.html
		var xmlhttp; 
		/*@cc_on 
		@if (@_jscript_version >= 5) 
			try 
			{
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (e) 
			{ 
				try 
				{ 
					xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
				} 
				catch (E) 
				{ 
					xmlhttp = false; 
				} 
			} 
		@else xmlhttp = false; 
		@end 
		@*/ 
		if (!xmlhttp && typeof XMLHttpRequest != 'undefined') 
		{ 
			try 
			{ 
				xmlhttp = new XMLHttpRequest(); 
			} 
			catch (e) 
			{ 
				xmlhttp = false; 
			} 
		} 
		return xmlhttp; 
	} 
function handleHttpResponse() 
{
	if (http.readyState == 4) 
	{
		var incoming_json = http.responseText; //http://www.json.org/js.html
		var productData = eval('('+incoming_json+')');
		
		right_this_instant = new Date(); 
		
		var money_time = getE('countdown'+productData.series_number);
		var a_link = getE('a'+productData.series_number);
		var li_class = getE('li_class'+productData.series_number);
		
		if(productData.hold_end > productData.now)
		{
			right_now = new Date();
			counted_ahead = parseInt(right_now.getTime()) + parseInt(productData.hold_end) - parseInt(productData.now);
			soon = new Date();
			soon.setTime(counted_ahead);
			countdown(productData.series_number,soon);
		}
		else if(productData.purchase_complete == "1")
		{
			money_time.innerHTML = 'SOLD!';
			li_class.className = 'sold_button';
		}
		else
		{
			money_time.innerHTML = '$' + productData.series_number;
			a_link.addEventListener("click",eval('enableProduct'+productData.series_number),true);
			li_class.className = 'purchase_button';
		}
		isWorking = false;
	}
}

var http = getHTTPObject(); // We create the HTTP Object
var isWorking = false;

function checkOnProduct(instance)
{
	if(!isWorking)
	{
		isWorking = true;
		var url="_svc/product_status.php?product_id=" + product_id + "&series_number=" + instance;
		http.open("GET", url , true);
		http.onreadystatechange = handleHttpResponse;
		http.send(null);
		var detailsDiv=document.getElementById('detailsDiv');
	}
	else
	{
		setTimeout("checkOnProduct()",500);
	}
}

String.prototype.pad = function(l, s)
{
	return (l -= this.length) > 0 ? (s = new Array(Math.ceil(l / s.length) + 1).join(s)).substr(0, s.length) + this + s.substr(0, l - s.length) : this;
};