// trimming help string
	var trimChars = "\s\t\n\r\0\x0B";

	// main structure object
	var jsonZones = null;
	var language = 'ru';
	
	// default values
	var defaultTariffPlan = 3;
	var defaultPhoneType  = 2;
	var defaultCountryFrom = 172;
	var defaultCountryTo = 172;
	
	// selected parameters
	//var selectedTariffPlan = defaultTariffPlan;
	var selectedPhoneTypeFrom = defaultPhoneType;
	var selectedPhoneTypeTo = defaultPhoneType;				
	var selectedCountryFrom = defaultCountryFrom;
	var selectedCountryTo = defaultCountryTo;				
	var selectedRegionFrom = null;
	var selectedRegionTo = null;
	//var selectedZoneArray = null;

	// trimming functions		
	function trim(str, chars) {
	    return ltrim(rtrim(str, chars), chars);
	}

	function ltrim(str, chars) {
	    chars = chars || "\\s";
	    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
	}
	
	function rtrim(str, chars) {
	    chars = chars || "\\s";
	    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
	}
	
	function getJsonZones() {
	    var xmlHttpReq = false;
	    var self = this;
	    
	    // Mozilla/Safari
	    if (window.XMLHttpRequest) {
	        self.xmlHttpReq = new XMLHttpRequest();
	    }
	    // IE
	    else if (window.ActiveXObject) {
	        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
	    }
	    self.xmlHttpReq.open('POST', '/calc2.php?lang='+language, true);
	    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	    self.xmlHttpReq.onreadystatechange = function() {
	        if (self.xmlHttpReq.readyState == 4) {
	            data = self.xmlHttpReq.responseText;
	            data = trim(data, trimChars);
				jsonZones = eval('('+ data +')');
				
				//setUpCountries('country_from');
				//selectedCountryFrom = setSelected('country_from', selectedCountryFrom);
				setUpCountries('country_to');
				selectedCountryTo = setSelected('country_to', selectedCountryTo);
				
				//showing up interface
				//setUpRegionsFrom();
				//setUpRegionsTo();			
				document.getElementById("zone_panel").style.display = "block";
				//document.getElementById("rate_plan_panel").style.display = "block";
					
				// rate plan select enabled	
				document.getElementById("rate_plan").disabled = false;
				
				
				// show first calculations
				setInnerHTML('cost_label', calculateSum('common') + rubPerMin);
				
				setInnerHTML('load_calc', '');
				Custom.init();				
	        }
	    }
	    self.xmlHttpReq.send('param=paramdata');
	}
	
	function getZoneByCountryId(tariffPlan, idCountry, phoneType) {
	    var selectedZones = jsonZones.phoneTypes[tariffPlan].zones[phoneType].zoneArray;
	    for (i = 0; i < selectedZones.length; i++){
	    	if (selectedZones[i].country.countryId == idCountry) {
	    		return selectedZones[i];
	    	}
	    }
	    return null;
	}
	
	function getRegionById(zoneObject, regionId) {
	    if (zoneObject != null && zoneObject.regions != null && zoneObject.regions.length > 0){
		    for (i = 0; i < zoneObject.regions.length; i++){
		    	if (zoneObject.regions[i].regionId == regionId) {
		    		return zoneObject.regions[i];
		    	}
		    }
	    } else {
	    	return null;
	    }
	}				
	
	function calculateSum(calculatorType){
		var sum;
		var sumFrom;
		var sumTo;					

		var tariffPlan;		
		var countryFrom;
		var countryTo;
		var phoneTypeFrom;
		var phoneTypeTo;
		var regionFrom;
		var regionTo;

		if (calculatorType == 'common'){
			tariffPlan    = selectedTariffPlan;		
			countryFrom   = selectedCountryFrom;
			countryTo     = selectedCountryTo;
			phoneTypeFrom = selectedPhoneTypeFrom;
			phoneTypeTo   = selectedPhoneTypeTo;
			regionFrom    = selectedRegionFrom;
			regionTo      = selectedRegionTo;
		} 

		var zoneTo = getZoneByCountryId(tariffPlan, countryTo, phoneTypeTo);
		var regionTo = getRegionById(zoneTo, regionTo);				
		
		if (regionTo != null){
			sumTo = regionTo.sum;
		} else {
			sumTo = zoneTo.country.sum;
		}

		return sumTo;
	}
	
	// Setting up environment after form change
	function setSelectedParameters() {
		var rate_plan = document.getElementById('rate_plan');
	    selectedTariffPlan = rate_plan.options[rate_plan.selectedIndex].value;
	    
		var country_from = document.getElementById('country_from');
	    //selectedCountryFrom = country_from.options[country_from.selectedIndex].value;
	    
		var country_to = document.getElementById('country_to');
	    selectedCountryTo = country_to.options[country_to.selectedIndex].value;
	 
		try {
			var region_from = document.getElementById('region_from');
		    selectedRegionFrom = region_from.options[region_from.selectedIndex].value;
	    } catch(e) { }

		try {
		    var region_to = document.getElementById('region_to');
		    selectedRegionTo = region_to.options[region_to.selectedIndex].value;
	    } catch(e) { }
	}
	
	// select elements enterface works
	function setInnerHTML(objectId, htmlText) {
		element = document.getElementById(objectId);
		element.innerHTML = htmlText; 
	}	
	
	function setSelected(objectId, valueToSelect)
	{
		var objectSelect = document.getElementById(objectId);
		for (i = 0; i < objectSelect.options.length; i++){
			if (objectSelect.options[i].value == valueToSelect){
				try {
					objectSelect.options.selectedIndex=i;
					objectSelect.options[i].selected = true;
               			} catch(e) {
                   	if(e.error!=undefined) {
			    		alert(e.error);
                   	}
				}						
			}
		}
		return objectSelect.options[objectSelect.selectedIndex].value;
	}	

	function setSelectedPhoneTypeFrom(value)
	{
		selectedPhoneTypeFrom = value;
	}	

	function setSelectedPhoneTypeTo(value)
	{
		selectedPhoneTypeTo = value;
	}
	
	function setUpCountries(selectId)
	{
		var oZoneFrom = document.getElementById(selectId);
		oZoneFrom.length = 0;
	     
	    var selectedZones = jsonZones.phoneTypes[selectedTariffPlan].zones[selectedPhoneTypeFrom].zoneArray;
	    for (i = 0; i < selectedZones.length; i++){
	        if (document.createElement) {
	            var newZoneOption = document.createElement("OPTION");
	            newZoneOption.text = selectedZones[i].country.name;
	            newZoneOption.value = selectedZones[i].country.countryId;
	            
	            // &#209;&#130;&#209;&#131;&#209;&#130; &#208;&#188;&#209;&#139; &#208;&#184;&#209;&#129;&#208;&#191;&#208;&#190;&#208;»&#209;&#140;&#208;·&#209;&#131;&#208;µ&#208;&#188; &#208;&#180;&#208;»&#209;&#143; &#208;&#180;&#208;&#190;&#208;±&#208;°&#208;&#178;&#208;»&#208;µ&#208;&#189;&#208;&#184;&#209;&#143; &#209;&#141;&#208;»&#208;µ&#208;&#188;&#208;µ&#208;&#189;&#209;&#130;&#208;° &#208;»&#208;&#184;&#208;±&#208;&#190; &#208;&#188;&#208;µ&#209;&#130;&#208;&#190;&#208;&#180; IE, &#208;»&#208;&#184;&#208;±&#208;&#190; DOM, &#208;&#186;&#208;&#190;&#209;&#130;&#208;&#190;&#209;&#128;&#209;&#139;&#208;µ, alas, &#208;&#189;&#208;µ &#209;&#129;&#208;&#190;&#208;&#178;&#208;&#191;&#208;°&#208;&#180;&#208;°&#209;&#142;&#209;&#130; &#208;&#191;&#208;&#190; &#208;&#191;&#208;°&#209;&#128;&#208;°&#208;&#188;&#208;µ&#209;&#130;&#209;&#128;&#208;°&#208;&#188;&#226;&#128;¦
	            (oZoneFrom.options.add) ? oZoneFrom.options.add(newZoneOption) : oZoneFrom.add(newZoneOption, null);
	        } else {
	            // &#208;&#180;&#208;»&#209;&#143; NN3.x-4.x
	            oZoneFrom.options[i] = new Option(selectedZones[i].country.name, selectedZones[i].country.countryId, false, false);
	        }
	    }
    }
		    
	function setUpRatePlanSwitch(){
		document.getElementById("switch_rate_link").href = "../eztalk/rate_plan.action?rate_plan=" + selectedTariffPlan;
		if (isUserLoged == 0 || currentUserTariffPlan == selectedTariffPlan || currentUserTariffPlan == tariffPlanCorporativeBlocked) {
			document.getElementById("switch_rate_proposition").style.display = "none";
		} else {
			document.getElementById("switch_rate_proposition").style.display = "block";
		}
	}	
	
	function onChange(element) {
		setSelectedParameters();

		if (element.id == 'rate_plan'){
			//setUpCountries('country_from');
			//selectedCountryFrom = setSelected('country_from', selectedCountryFrom);
			setUpCountries('country_to');
			selectedCountryTo = setSelected('country_to', selectedCountryTo);
			
			setUpRatePlanSwitch();
		}
		if (element.id == 'rate_plan' || element.id == 'country_from' || element.id == 'country_to'){
			//setUpRegionsFrom();
		}
			
		setInnerHTML('cost_label', calculateSum('common') + rubPerMin);
		
	}

	// starting script
	function startRatePlanCalculators(lang) {
		if(lang) language = lang;
		document.getElementById("rate_plan").disabled = true;
		setSelected('rate_plan', selectedTariffPlan);
		getJsonZones();
		setUpRatePlanSwitch();

		//setInnerHTML('cost_label', loadingText);
		setInnerHTML('load_calc', loadingText);
		
	}
	
	/*
	function setUpRegionsFrom(){
		var selectedZone = getZoneByCountryId(selectedCountryFrom, selectedPhoneTypeFrom);
		var regions_from_panel = document.getElementById("regions_from_panel");
		
		if (selectedZone != null && selectedZone.regions != null && selectedZone.regions.length > 0) {
			regions_from_panel.style.display = "block";
			var oRegionFrom = document.getElementById("region_from");
			oRegionFrom.length = 0;
		     
		    for (i = 0; i < selectedZone.regions.length; i++){
		        if (document.createElement) {
		            var newZoneOption = document.createElement("OPTION");
		            newZoneOption.text = selectedZone.regions[i].name;
		            newZoneOption.value = selectedZone.regions[i].regionId;
		            
		            // &#209;&#130;&#209;&#131;&#209;&#130; &#208;&#188;&#209;&#139; &#208;&#184;&#209;&#129;&#208;&#191;&#208;&#190;&#208;»&#209;&#140;&#208;·&#209;&#131;&#208;µ&#208;&#188; &#208;&#180;&#208;»&#209;&#143; &#208;&#180;&#208;&#190;&#208;±&#208;°&#208;&#178;&#208;»&#208;µ&#208;&#189;&#208;&#184;&#209;&#143; &#209;&#141;&#208;»&#208;µ&#208;&#188;&#208;µ&#208;&#189;&#209;&#130;&#208;° &#208;»&#208;&#184;&#208;±&#208;&#190; &#208;&#188;&#208;µ&#209;&#130;&#208;&#190;&#208;&#180; IE, &#208;»&#208;&#184;&#208;±&#208;&#190; DOM, &#208;&#186;&#208;&#190;&#209;&#130;&#208;&#190;&#209;&#128;&#209;&#139;&#208;µ, alas, &#208;&#189;&#208;µ &#209;&#129;&#208;&#190;&#208;&#178;&#208;&#191;&#208;°&#208;&#180;&#208;°&#209;&#142;&#209;&#130; &#208;&#191;&#208;&#190; &#208;&#191;&#208;°&#209;&#128;&#208;°&#208;&#188;&#208;µ&#209;&#130;&#209;&#128;&#208;°&#208;&#188;&#226;&#128;¦
		            (oRegionFrom.options.add) ? oRegionFrom.options.add(newZoneOption) : oRegionFrom.add(newZoneOption, null);
		        } else {
		            // &#208;&#180;&#208;»&#209;&#143; NN3.x-4.x
		            oRegionFrom.options[i] = new Option(selectedZone.regions[i].name, selectedZone.regions[i].regionId, false, false);
		        }
		    }
			selectedRegionFrom = setSelected('region_from', selectedRegionFrom);					    
		} else {
			regions_from_panel.style.display = "none";
		}
	}
	
	function setUpRegionsTo(){
		var selectedZone = getZoneByCountryId(selectedCountryTo, selectedPhoneTypeTo);
		var regions_to_panel = document.getElementById("regions_to_panel");
		
		if (selectedZone != null && selectedZone.regions != null && selectedZone.regions.length > 0) {
						regions_to_panel.style.display = "block";
						
			var oRegionTo = document.getElementById("region_to");
			oRegionTo.length = 0;
		     
		    for (i = 0; i < selectedZone.regions.length; i++){
		        if (document.createElement) {
		            var newZoneOption = document.createElement("OPTION");
		            newZoneOption.text = selectedZone.regions[i].name;
		            newZoneOption.value = selectedZone.regions[i].regionId;
		            
		            // &#209;&#130;&#209;&#131;&#209;&#130; &#208;&#188;&#209;&#139; &#208;&#184;&#209;&#129;&#208;&#191;&#208;&#190;&#208;»&#209;&#140;&#208;·&#209;&#131;&#208;µ&#208;&#188; &#208;&#180;&#208;»&#209;&#143; &#208;&#180;&#208;&#190;&#208;±&#208;°&#208;&#178;&#208;»&#208;µ&#208;&#189;&#208;&#184;&#209;&#143; &#209;&#141;&#208;»&#208;µ&#208;&#188;&#208;µ&#208;&#189;&#209;&#130;&#208;° &#208;»&#208;&#184;&#208;±&#208;&#190; &#208;&#188;&#208;µ&#209;&#130;&#208;&#190;&#208;&#180; IE, &#208;»&#208;&#184;&#208;±&#208;&#190; DOM, &#208;&#186;&#208;&#190;&#209;&#130;&#208;&#190;&#209;&#128;&#209;&#139;&#208;µ, alas, &#208;&#189;&#208;µ &#209;&#129;&#208;&#190;&#208;&#178;&#208;&#191;&#208;°&#208;&#180;&#208;°&#209;&#142;&#209;&#130; &#208;&#191;&#208;&#190; &#208;&#191;&#208;°&#209;&#128;&#208;°&#208;&#188;&#208;µ&#209;&#130;&#209;&#128;&#208;°&#208;&#188;&#226;&#128;¦
		            (oRegionTo.options.add) ? oRegionTo.options.add(newZoneOption) : oRegionTo.add(newZoneOption, null);
		        } else {
		            // &#208;&#180;&#208;»&#209;&#143; NN3.x-4.x
		            oRegionTo.options[i] = new Option(selectedZone.regions[i].name, selectedZone.regions[i].regionId, false, false);
		        }
		    }
		    
    					selectedRegionTo = setSelected('region_to', selectedRegionTo);
					} else {
						regions_to_panel.style.display = "none";
					}
	}
	*/