var req;
		function loadXmlDoc(url,id)
		{
			// branch for native XMLHttpRequest object
    		if(window.XMLHttpRequest) 
    		{
    			try 
    			{
					req = new XMLHttpRequest();
        		} 
        		catch(e) 
        		{
					req = false;
        		}
    		// branch for IE/Windows ActiveX version
    		} 
    		else if(window.ActiveXObject) 
    		{
       			try 
       			{
        			req = new ActiveXObject("Msxml2.XMLHTTP");
      			} 
      			catch(e) 
      			{
        			try 
        			{
          				req = new ActiveXObject("Microsoft.XMLHTTP");
        			} 
        			catch(e) 
        			{
          				req = false;
        			}
				}
    		}
			if(req) 
			{
			
				switch(id)
				{
					case 1:
						req.onreadystatechange = processReqChange_callback;
						break;
					case 2:
						req.onreadystatechange = populateMenuItemSelect_callback;
						break;
					case 3:
						req.onreadystatechange = updateNutritionTable_callback;
						break;
					default:
						alert('default case');
				}			
				
				req.open("GET", url, true);
				req.send("");
			}
		}
		
		function processReqChange_callback()
		{
			// only if req shows "loaded"
			if (req.readyState == 4) 
    		{
    			// only if "OK"
        		if (req.status == 200) 
        		{
        			var items = req.responseXML.getElementsByTagName('component').item(0).childNodes;
        			for (var i=0;i<items.length;i++)
        			{
        				var name = items.item(i).nodeName;
		        		var value = items.item(i).childNodes.item(0).nodeValue;
        				document.getElementById(name).innerHTML = value;
        			}        			
        		} 
        		else 
        		{
            		alert("There was a problem retrieving the XML data:\n" +
                	req.statusText);
        		}
    		}    		
		}
		
		function buildRequest(frm, serverName)
		{
			var url = "http://" + serverName + "/food/UpdateNutritionTable.jsp";
			var parameters = '?recalculation=on';
			var len = frm.elements.length;
			for (i=0;i<len;i++)
			{
				var element = frm.elements[i];
				if ((element.type == 'checkbox') && (element.checked == true))
				{
					parameters = parameters + '&' + element.value + '=' + element.value;
				}
			}
			loadXmlDoc(url + parameters,1);			
		}
		
		function buildMenuItemSelect(country, lang, serverName)
		{
			var categoryId = document.getElementById('categorySelect').value;
			if (categoryId < 0)
			{
				return;
			}
			var url = "http://" + serverName + "/food/GetProducts.jsp?country=" + country + "&lang=" + lang;
			url = url + "&family=" + categoryId;
			loadXmlDoc(url,2);
		}
		
		function populateMenuItemSelect_callback()
		{
			// only if req shows "loaded"
			if (req.readyState == 4) 
    		{
    			// only if "OK"
        		if (req.status == 200) 
        		{
        			clearSelectList(document.getElementById('menuItemSelect'));
        			var products = req.responseXML.getElementsByTagName('product');
        			for (var i = 0;i<products.length;i++)
        			{
        				var productId = products.item(i).childNodes.item(0).childNodes.item(0).nodeValue;
        				var productName = products.item(i).childNodes.item(1).childNodes.item(0).nodeValue;
        				appendToSelect(document.getElementById('menuItemSelect'),productId,productName);
        			}
        		} 
        		else 
        		{
            		alert("There was a problem retrieving the XML data:\n" +
                	req.statusText);
        		}
    		}
		}
		
		function appendToSelect(selectName,selectValue,selectText)
		{
			var opt = document.createElement("option");
			opt.value = selectValue;
			opt.setAttribute('class','small_text');
			var txt = document.createTextNode(selectText);
			opt.appendChild(txt);
			selectName.appendChild(opt);
		}
		
		function clearSelectList(selectName)
		{
			while(selectName.length > 0)
			{
				selectName.remove(0);
			}
		}
		
		function updateNutritionTable(deletedProductsList,componentsList,quantities, serverName) {
			var url = "http://" + serverName + "/food/UpdateNutritionTable.jsp?";
			if (deletedProductsList.length > 0) {
				url = url + 'deletedProductsList=' + deletedProductsList;
			}
			url = url + '&components=' + componentsList;
			url = url + '&quantities=' + quantities;
			url = url + '&recalculation=yes';
			loadXmlDoc(url,3);
		}
		
		function updateNutritionTable_callback() {
			// only if req shows "loaded"
			if (req.readyState == 4) {
    			// only if "OK"
    			if (req != null && req.status == 200 && req.responseXML.getElementsByTagName('numberofproducts').length > 0) {
					var numberOfProducts = req.responseXML.getElementsByTagName('numberofproducts')[0].childNodes[0].nodeValue;
					if (numberOfProducts == 0) {
						window.location.href = "/food/NutritionLanding.jsp";
					}
					var components = req.responseXML.getElementsByTagName('component');
        			for (var i=0;i<components.length;i++) {
        				var component = components[i].childNodes;
        				var productId = component.item(0).childNodes[0].nodeValue;
        				for (var j=1;j<component.length;j++) {
        					var componentName = component.item(j).nodeName;
        					var componentValue = component.item(j).childNodes[0].nodeValue;
        					document.getElementById(productId + '_' + componentName).innerHTML = componentValue;
        				}
        			}
        			
        			/*Update the total of all products*/
        			var totalComponent = req.responseXML.getElementsByTagName('totalComponent')[0].childNodes;
        			for (var i=0;i<totalComponent.length;i++) {
        				var componentName = totalComponent.item(i).nodeName;
        				var componentValue = totalComponent.item(i).childNodes[0].nodeValue;	
        				document.getElementById(componentName).innerHTML = componentValue;
        			}        			
        		} else {
            		alert("There was a problem retrieving the XML data:\n" +
                	req.statusText);
        		}
    		}
		}
		
		function changeMealName(edit) {
			if (edit) {
				var mealName = document.getElementById('mealNameText').innerHTML;
				document.getElementById('mealNameText').innerHTML = '<input type=\"text\" name=\"mealName\" id=\"mealName\" value=\" ' + mealName + '\">';
				document.getElementById('mealNameCommand').innerHTML = '&nbsp;<a href=\"javascript:changeMealName(false);\">Change</a>';
				return;
			}
    		
    		var mealName = document.getElementById('mealName').value;
    		if (!mealName || mealName.length == 0) {
    			return;
    		}
			document.getElementById('mealNameText').innerHTML = mealName;
			document.getElementById('mealNameCommand').innerHTML = '&nbsp;<a href=\"javascript:changeMealName(true);\">Edit</a>';
    	}