var stControl = "";
var stTab = "";
						
	function showCalc(){
		fadeAll();
		tabsOff();
		jQuery("#mpTab1").removeClass("mpTabOffLg");
		jQuery("#mpTab1").addClass("mpTabActiveLg");
		//jQuery("#mpTab1").css("background-image", "url(../../_inc/images/div_bgs/roi-tab-hoverbg.png)"); 
		jQuery("#calculator").fadeIn("slow");
	}
	
	function showDetails(){
		fadeAll();
		jQuery("#calculator").fadeIn("slow");
	}
	
	function showeLearning(){
		fadeAll();
		tabsOff();
		jQuery("#mpTab2").removeClass("mpTabOffLg");
		jQuery("#mpTab2").addClass("mpTabActiveLg");
		//jQuery("#mpTab2").css("background-image", "url(../../_inc/images/div_bgs/roi-tab-hoverbg.png)"); 
		jQuery("#eLearning").fadeIn("slow");
		
	}
	
	function showTraining(){
		fadeAll();
		tabsOff();
		jQuery("#mpTab3").removeClass("mpTabOffLg");
		jQuery("#mpTab3").addClass("mpTabActiveLg");
		//jQuery("#mpTab3").css("background-image", "url(../../_inc/images/div_bgs/roi-tab-hoverbg.png)"); 
		jQuery("#Training").fadeIn("slow");
		
	}
	
	function tabsOff(){
		jQuery('#mpTabs > span').removeClass("mpTabActiveLg");
		jQuery('#mpTabs > span').addClass("mpTabOffLg");
		jQuery("#mpTab1").addClass("#mpTab1)"); 
		jQuery("#mpTab2").css("#mpTab2)"); 
		jQuery("#mpTab3").css("#mpTab3)"); 
	}
	
	function fadeAll(){
		jQuery("#calculator, #eLearning, #Training" ).fadeOut("slow");
	}
		
	function assignPosition(d) {
		var ry = 0;
		if(self.pageYOffset) {	
			rX = self.pageXOffset;	
			rY = self.pageYOffset;	
		}else if(document.documentElement && document.documentElement.scrollTop) {	
			rX = document.documentElement.scrollLeft;	
			rY = document.documentElement.scrollTop;	
		}else if(document.body) {	
			rX = document.body.scrollLeft;	
			rY = document.body.scrollTop;	
		}
		
		d.style.top = (rY+50) + "px";
	}	
	
	function getRadioValue(elementName)
	{
		var element = document.getElementsByName(elementName);
		var bt_count = element.length; // can't use element.length in the loop, as it would decrement
	 
		for (var i = 0; i < bt_count; i++)
			if (element[i].checked == true)
				return element[i].value;
	}

	
	function checkValidation(){
		
		var chkBuy = document.getElementById('chkBought')
		if(chkBuy){
			var retBool = false;
			var valRad = getRadioValue('chkBought');
			stTab = "mpTab2";
			if(valRad == 1 ){
				if(validateValue('buyIn','Bought In Cost, in "E-Learning settings"')){
					retBool = true;
				}	
			}else{
				if(validateValue('story', 'Storyboarding Hours, in "E-Learning settings"')){
					if(validateValue('auth', 'Authoring Hours, in "E-Learning settings"')){
						if(validateValue('sme', 'SME Hours, in "E-Learning settings"')){
							if(validateValue('review', 'Review Hours, in E-Learning settings"')){
								if(validateValue('graphics', 'Graphics Hours, in "E-Learning settings"')){
									if(validateValue('other', 'Other Hours, in "E-Learning settings"')){			
										if(validateValue('rate','Avg Developer Rate, in "E-Learning settings"')){
											retBool = true;
										}
									}
								}
							}					
						}
					}
				}	
			}	
		}

		
		if(retBool == true){			
		stTab = "mpTab1";	
			if(document.getElementById('time').options[document.getElementById('time').options.selectedIndex].value == 121){
				retBool=false;
				if(validateValue('hours', 'Hours, in "Calculator"')){
					retBool=true;
				}
			}
		}
		if(retBool == true){	
			retBool=false;
			if(validateValue('numUsers', 'Users, in "Calculator"')){
				roundControl('numUsers');
				if(validateValue('numCourses', 'Courses, in "Calculator"')){
					roundControl('numCourses');
					retBool=true;
				}
			}
		}
		
		if(retBool==true){ //continue checking
		stTab = "mpTab3";
			if(validateValue('roomCap','Room Capacity, in "Classroom settings"')){
				if(validateValue('roomRate','Room hire, in "Classroom settings"')){
					if(validateValue('trainerRate','Trainer fees per day, in "Classroom settings"')){
						if(validateValue('userRate','hourly delegate rate, in "Classroom settings"')){
							if(validateValue('hrsDay','hours in a day, in "Classroom settings"')){
								if(validateValue('hrsEDay','hours replaced by 1 hour e-learning, in "Classroom settings"')){
										return true;
								}
							}
						}
					}
				}
			}
		
		}

		switch(stTab){
			case "mpTab1":
				showCalc();
				break;
			case "mpTab2":
				showeLearning();
				break;
			case "mpTab3":
				showTraining();
				break;
		}
		
		var tmpObject = document.getElementById(stControl);
		
		if(tmpObject){
			tmpObject.focus();
		}
		
		return false;
	}
	function showAdvTime(sel){
		var advTime = document.getElementById("advTime");

		if(sel && advTime){
			if(sel.options[sel.options.selectedIndex].value == 121){
				advTime.style.visibility="visible";
			}else{
				advTime.style.visibility="hidden";
			}
		}
	}
	
	function validateValue(stName, stTag){
		stControl = stName;
		inObj = document.getElementById(stName);
		if(!inObj){
			return false;
		}
	
		inVal=inObj.value;
		inVal = inVal.replace(/,/g,"");
		
		if(inVal.indexOf(' ')!=-1){
		    alert('Please specify number of ' + stTag + '.');
			return false;
		}
		
		if(inVal==''){
		    alert('Please specify number of ' + stTag + '.');
		    return false;
		}
		
		if(inVal<0){
		    alert('Please specify number of ' + stTag + '.');
		    return false;
		}
		
		if(isNaN(inVal)){
		    alert('Please specify a numeric value for the number of ' + stTag + '.' );
		    return false;
		}

		//allow 0 for now
		/*if(eval(inVal)=='0'){
            alert('Please specify number of ' + stTag + '.');
		    return false;
		}*/
	
		return true;
	}
	
	function roundControl(stName){
		stControl = stName;
		inObj = document.getElementById(stName);
		
		if(inObj){
			inObj.value=(Math.ceil(inObj.value));	
		}	
	}
	
	function resetAll(){
		resetObj('numUsers', '');
		resetObj('numCourses', '');
		resetObj('hours', '');
		resetSelect('time',1);
		resetSelect('minutes',0);
		resetCourse();
		resetTrain();
	
	}
	
	function resetCourse(){
		resetObj('story','');
		resetObj('auth', '');
		resetObj('sme', '');
		resetObj('review', '');
		resetObj('graphics', '');
		resetObj('other', '');
		resetObj('rate', '0.00');
		resetObj('buyIn','0.00');
	
	}
	
	function resetTrain(){
		resetObj('trainerRate', '0.00');
		resetObj('roomRate', '0.00');
		resetObj('userRate', '0.00');
		resetObj('hrsDay', '');
		resetObj('hrsEDay', '');
		resetObj('roomCap', '');
	}
	
	function resetObj(stId, stNew){
		var tmpObj = document.getElementById(stId);
		if(tmpObj){
			tmpObj.value = stNew;
		}
	}
	function resetSelect(stId,iNew){
		var tmpObj = document.getElementById(stId);
		if(tmpObj){
			tmpObj.selectedIndex = iNew;
		}
	
	}
	
	function exportExcel(){
		var frm = document.getElementById('roiCalc');
		if(frm){
			frm.action="writeExcel.php";
			frm.target="Excel";
			frm.onSubmit="window.open('', 'excel', 'width=450,height=300,status=yes,resizable=yes,scrollbars=yes')";
			frm.submit();
			
			frm.action="index.php";
			frm.target="";
			frm.onSubmit="";		
		}	
	}