var sendReq = getXmlHttpRequestObject();
var receiveReq = getXmlHttpRequestObject();
var receiveReqInfoBox = getXmlHttpRequestObject();
var file = 'getCart.php';
var loc = 'span_cart';
var tmp = '&nbsp;<img src=images/loading_sc.gif alt=loading>&nbsp;Please wait...<br/>';
var gids = '';
//Function for initializating the page.
function startCart(key,file,sid,loc,tmp) 
{
	//Start Showing Cart.
	getCartText('',file,sid,loc,tmp);
}
//Gets the browser specific XmlHttpRequest Object
function getXmlHttpRequestObject() 
{
	if (window.XMLHttpRequest) 
	{
				return new XMLHttpRequest();
	} 
	else if(window.ActiveXObject) 
	{
				return new ActiveXObject("Microsoft.XMLHTTP");
	} 
	else 
	{
		document.getElementById('p_status').innerHTML = 'Status: Cound not create XmlHttpRequest Object.  Consider upgrading your browser.';
			}
}
//Gets the current cart
function getCartText(key,file,sid,loc,tmp) 
{
	var url=file+"?"+sid+"&"+key;
	if (sid && key) 
	{
		url=file+"?"+sid+"&"+key;
	} 
	else 
	{
		if (sid) 
		{
			url=file+"?"+sid;
		} 
		else 
		{
			if (key) 
			{
				url=file+"?"+key;
			} 
			else 
			{
				url=file;
			}
		}
	}
	if (tmp) {getObject(loc).innerHTML = tmp;}
	if (receiveReq.readyState == 4 || receiveReq.readyState == 0) 
	{
		receiveReq.open("GET", url+'&Cart=1', true);
		receiveReq.onreadystatechange = handleReceiveCart;
		receiveReq.send(null);
	}
}
//Gets the current cart info box
function getCartInfoBoxText(key,file,sid,loc,tmp) 
{
	var url=file+"?"+sid+"&"+key;
	if (sid && key) 
	{
		url=file+"?"+sid+"&"+key;
	} 
	else 
	{
		if (sid) 
		{
			url=file+"?"+sid;
		} 
		else 
		{
			if (key) 
			{
				url=file+"?"+key;
			} 
			else 
			{
				url=file;
			}
		}
	}
	if (tmp) {getObject(loc).innerHTML = tmp;}
        if (receiveReqInfoBox.readyState == 4 || receiveReqInfoBox.readyState == 0) 
	{
		receiveReqInfoBox.open("GET", url+'&Cart=1', true);
		receiveReqInfoBox.onreadystatechange = handleReceiveCartInfoBox;
		receiveReqInfoBox.send(null);
	}
}
//send change of stock to Cart.
function sendCartChangeQty(key,file,sid,loc,tmp,iElementId,product_id,qty) 
{
	if (typeof iElementId == "string" && iElementId.length > 0) 
	{
		var element = document.getElementById(iElementId);
		if (element) 
		{
			//alert("name=" + element.name + " - id=" + element.id);
			//return;
		}
		else 
		{
			document.getElementById('p_status').innerHTML = 'Status: Could not find the requested element.';
			return;
		}
	}
	if (qty.length > 0) 
	{
		qty_float = parseFloat(qty);
		if (isNaN(qty_float)) 
		{
			document.getElementById('p_status').innerHTML = 'Status: You must enter a number for Quantity.';
			return;
		}
	} 
	else 
	{
		qty_float = 1;
	}
	// check if Quantity drops below 0
	if  (Number(element.value) + Number(qty) <= 0) 
	{
		// Are you sure you want to remove this item
		var fRet;
		fRet = confirm('Are you sure you want to remove this item from your shopping cart?');
		if (fRet == false) 
		{ 
			return; 
		}
	}
	var url=file+"?"+sid+"&"+key;
	if (sid && key) 
	{
		url=file+"?"+sid+"&"+key;
	} 
	else 
	{
		if (sid) 
		{
			url=file+"?"+sid;
		} 
		else 
		{
			if (key) 
			{
				url=file+"?"+key;
			} 
			else 
			{
				url=file;
			}
		}
	}
	if (tmp) {getObject(loc).innerHTML = tmp;}
	if (sendReq.readyState == 4 || sendReq.readyState == 0) 
	{
		sendReq.open("POST", url+'&Cart=1', true);
		sendReq.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		sendReq.onreadystatechange = handleSendCart;
		var param = 'quantity=' + (Number(element.value) + Number(qty));
		param += '&products_id=' + product_id;
		sendReq.send(param);
	}
}
//send change of stock to Cart.
function sendCartRemoveItem(key,file,sid,loc,tmp,iElementId,product_id) 
{
	if (typeof iElementId == "string" && iElementId.length > 0) 
	{
		var element = document.getElementById(iElementId);
		if (element) 
		{
			//alert("name=" + element.name + " - id=" + element.id);
			//return;
		} 
		else 
		{
			document.getElementById('p_status').innerHTML = 'Status: Could not find the requested element.';
			return;
		}
	}
	// check user wants to remove item
	if  (element.value != '') 
	{
		// Are you sure you want to remove this item                                   		var fRet;
		fRet = confirm('Are you sure you want to remove this item from your shopping cart?');
		//alert(fRet);
		if (fRet == false) { return; }
	}
	var url=file+"?"+sid+"&"+key;
	if (sid && key) 
	{
		url=file+"?"+sid+"&"+key;
	} 
	else 
	{
		if (sid) 
		{
			url=file+"?"+sid;
		} 
		else 
		{
			if (key) 
			{
				url=file+"?"+key;
			} 
			else 
			{
				url=file;
			}
		}
	}
	if (tmp) {getObject(loc).innerHTML = tmp;}
	if (sendReq.readyState == 4 || sendReq.readyState == 0) 
	{
		sendReq.open("POST", url+'&Cart=1', true);
		sendReq.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		sendReq.onreadystatechange = handleSendCartRemoveItem;
		var param = '&products_id=' + product_id;
		param += '&cart_delete=Yes';
		sendReq.send(param);
	}
}
//When our stock change has been sent, update our page.
function handleSendCart() 
{
	getCartText('','getCart.php','osCsid=g5881cpj9spr003kidhfpq07d5','span_cart',tmp);
	getCartInfoBoxText('','getCartBox.php','osCsid=g5881cpj9spr003kidhfpq07d5','span_cart_box',tmp);
}
function elmLoop()
{
	for(i=0; i<document.forms.length;i++)
	{
		var theForm = document.forms[i]
		//alert(theForm.name);
		if(theForm.name == 'cart_quantity') break;
	}
	for(i=0; i<theForm.elements.length; i++)
	{
		var alertText = ""
		alertText += "Element Type: " + theForm.elements[i].type + "\n"

		if(theForm.elements[i].type == "select-one")
		{
			var name = theForm.elements[i].name;
			var value = theForm.elements[i].options[theForm.elements[i].selectedIndex].value;
      			alertText += "Selected Option's Text: " + theForm.elements[i].options[theForm.elements[i].selectedIndex].text + "\n"
			alertText += "ID="+theForm.elements[i].name;
			if(name != 'qty')
			{
				gids += name + '=' + value + ';';
			}
      		}
//		alert(alertText)
	}
} 
// just update box text with this function
function sendCartInfoBox() 
{
//alert(document.getElementById('products_id').value);
gids = '';
elmLoop();
//alert(gids);
	var qtyelem = document.getElementById('qty');
	var qty = qtyelem.options[qtyelem.selectedIndex].value;
//alert(qty);
	var pid = document.getElementById('products_id').value;
	var key = 'products_id='+pid+'&ids='+gids+'&qty='+qty+'&action=add_product_ajax';
	getCartInfoBoxText(key,'getCartBox.php','osCsid=g5881cpj9spr003kidhfpq07d5','span_cart_box',tmp);
}
//Function for handling the return of Cart text
function handleReceiveCart() 
{
	//Check to see if the XmlHttpRequests state is finished.
	if (receiveReq.readyState == 4) 
	{
		//Set the contents of our span element to the result of the asyncronous call.
		document.getElementById('span_cart').innerHTML = receiveReq.responseText;
	}
}
//Function for handling the return of Cart Info Box text
function handleReceiveCartInfoBox() 
{
	//Check to see if the XmlHttpRequests state is finished.
	if (receiveReqInfoBox.readyState == 4) 
	{
		//Set the contents of our span element to the result of the asyncronous call.
		document.getElementById('span_cart_box').innerHTML = receiveReqInfoBox.responseText;
	}
}
//When our stock change has been sent, update our page.
function handleSendCartRemoveItem() 
{
	//getCartText('','getCart.php','osCsid=g5881cpj9spr003kidhfpq07d5',loc,tmp);
	getCartInfoBoxText('','getCartBox.php','osCsid=g5881cpj9spr003kidhfpq07d5','span_cart_box',tmp);
}
function getObject(name) 
{
	var ns4 = (document.layers) ? true : false;
	var w3c = (document.getElementById) ? true : false;
	var ie4 = (document.all) ? true : false;
	if (ns4) return eval('document.' + name);
	if (w3c) return document.getElementById(name);
	if (ie4) return eval('document.all.' + name);
	return false;
}