var price = 0;
var fworkSet = 0;
var dieselSet = 0;
var sdbSet = 0;
var makostSet = 0;
var wkrtierSet = 0;
var baukostSet = 0;
var greenhouseSet = 0;
var vrpflanzeSet = 0;
var wdrechnerSet = 0;

// change me if necessary
var stdPrice = 15;

function add(x, y) {
	var checked = document.getElementById(y).checked;

	// debugging
	// alert("add(x, y)");

	if (y == "feldarbeit") {

		if (checked && fworkSet == 0) {
			price = price + x;
			fworkSet = 1;
		}

		if (!checked && fworkSet == 1) {
			price = price - x;
			fworkSet = 0;
		}
	}
	if (y == "diesel") {
		if (checked && dieselSet == 0) {
			price = price + x;
			dieselSet = 1;
		}

		if (!checked && dieselSet == 1) {
			price = price - x;
			dieselSet = 0;
		}
	}
	if (y == "standard") {
		if (checked && sdbSet == 0) {
			price = price + x;
			sdbSet = 1;
		}

		if (!checked && sdbSet == 1) {
			price = price - x;
			sdbSet = 0;
		}
	}

	if (y == "makost") {
		if (checked && makostSet == 0) {
			price = price + x;
			makostSet = 1;
		}

		if (!checked && makostSet == 1) {
			price = price - x;
			makostSet = 0;
		}
	}
	if (y == "wkrtier") {
		if (checked && wkrtierSet == 0) {
			price = price + x;
			wkrtierSet = 1;
		}

		if (!checked && wkrtierSet == 1) {
			price = price - x;
			wkrtierSet = 0;
		}
	}
	if (y == "baukost") {
		if (checked && baukostSet == 0) {
			price = price + x;
			baukostSet = 1;
		}

		if (!checked && baukostSet == 1) {
			price = price - x;
			baukostSet = 0;
		}
	}
	if (y == "greenhouse") {
		if (checked && greenhouseSet == 0) {
			price = price + x;
			greenhouseSet = 1;
		}

		if (!checked && greenhouseSet == 1) {
			price = price - x;
			greenhouseSet = 0;
		}
	}

	if (y == "vrpflanze_gesamt") {
		if (checked && vrpflanzeSet == 0) {
			price = price + x;
			vrpflanzeSet = 1;
		}

		if (!checked && vrpflanzeSet == 1) {
			price = price - x;
			vrpflanzeSet = 0;
		}
	}
	
	if (y == "wdrechner") {
		if (checked && wdrechnerSet == 0) {
			price = price + x;
			wdrechnerSet = 1;
		}

		if (!checked && wdrechnerSet == 1) {
			price = price - x;
			wdrechnerSet = 0;
		}
	}
	
	document.getElementById("sum").innerHTML = price + " €";
	var value = document.createAttribute("value");
	value.nodeValue = price;
	var Element = document.getElementById("eingabe").endSum;
	Element.setAttributeNode(value);

}

function resetSum() {

//	 alert("resetSum()");
	price = 0;
	fworkSet = 0;
	dieselSet = 0;
	sdbSet = 0;
	makostSet = 0;
	wkrtierSet = 0;
	baukostSet = 0;
	greenhouseSet = 0;
	vrpflanzeSet = 0;
	wdrechnerSet = 0;

	document.getElementById("sum").innerHTML = price + " €";
	var value = document.createAttribute("value");
	value.nodeValue = price;
	var Element = document.getElementById("eingabe").endSum;
	Element.setAttributeNode(value);

}

function loaded() {

	// alert("loaded()");

	// on error, make right price
	var feldarbeit = document.getElementById("feldarbeit").checked;
	// alert("feldarbeit : " + document.getElementById("feldarbeit"));

	var diesel = document.getElementById("diesel").checked;
	// alert("diesel : " + document.getElementById("diesel"));

	var standard = document.getElementById("standard").checked;
	// alert("standard : " + document.getElementById("standard"));

	var makost = document.getElementById("makost").checked;
	// alert("makost : " + document.getElementById("makost"));

	var wkrtier = document.getElementById("wkrtier").checked;
	// alert("wkrtier : " + document.getElementById("wkrtier"));

	var baukost = document.getElementById("baukost").checked;
	// alert("baukost : " + document.getElementById("baukost"));

	var greenhouse = document.getElementById("greenhouse").checked;
	// alert("greenhouse : " + document.getElementById("greenhouse"));

	var vrpflanze_gesamt = document.getElementById("vrpflanze_gesamt").checked;
	
	var wdrechner = document.getElementById("wdrechner").checked;

	if (feldarbeit) {
		price = price + stdPrice;
		fworkSet = 1;
	}

	if (diesel) {
		// alert("diesel -> true");
		price = price + stdPrice;
		dieselSet = 1;
	}

	if (standard) {
		price = price + stdPrice;
		sdbSet = 1;
	}

	if (makost) {
		// alert("makost -> true");
		price = price + stdPrice;
		makostSet = 1;
	}

	if (wkrtier) {
		price = price + stdPrice;
		wkrtierSet = 1;
	}

	if (baukost) {
		price = price + stdPrice;
		baukostSet = 1;
	}

	if (greenhouse) {
		price = price + stdPrice;
		greenhouseSet = 1;
	}

	if (vrpflanze_gesamt) {
		price = price + stdPrice;
		vrpflanzeSet = 1;
	}
	
	if (wdrechner) {
		price = price + stdPrice;
		wdrechnerSet = 1;
	}

	// alert("price : " + price);

	document.getElementById("sum").innerHTML = price + " €";
	var value = document.createAttribute("value");
	value.nodeValue = price;
	var Element = document.getElementById("eingabe").endSum;
	Element.setAttributeNode(value);

}