function add_window(num) {
count = 1;
document.getElementById("window_calc").style.display = "block";
num_ = document.getElementById("window_img");
num_.src = '/assets/calc_ru/windows/' + num +'/1.gif';
document.getElementById("window_button_prev").style.display = "block";
document.getElementById("window_button_prev").disabled = "disabled";
document.getElementById("window_button_next").style.display = "block";
document.getElementById("window_button_next").disabled = "";
}

function change_window_next(place, num) {
	count = count+1;
	num_ = document.getElementById("window_img");
	num_.src = '/assets/calc_ru/windows/' + place +'/' + count + '.gif';
	if (count >= num) { 
		document.getElementById("window_button_next").disabled = "disabled";
		document.getElementById("window_button_prev").disabled = "";
	}
}

function change_window_prev(place, num) {
	count = count-1;
	num_ = document.getElementById("window_img");
	num_.src = '/assets/calc_ru/windows/' + place +'/' + count + '.gif';
	if (count == 1) { 
		document.getElementById("window_button_prev").disabled = "disabled";
		document.getElementById("window_button_next").disabled = "";
	}
}

function get_window_img_src() {
	document.getElementById("window_img_src").value = document.getElementById("window_img").src;
}

function hide_window_data() {
	width_ = document.getElementById("width_");
	height_ = document.getElementById("height_");
	if (width_.value == "") { alert("Вы не ввели значение ширины конструкции!"); width_.focus(); err = 1; };
	if (height_.value == "") { alert("Вы не ввели значение высоты конструкции!"); height_.focus(); err = 1; };
	if ((width_.value != "")&&(height_.value !="")) err = 0;
	if (err != 1) {
	document.getElementById("window_calculation_div").style.display = "none";
	document.getElementById("window_contacts_div").style.display = "block";
	};
}

function add_balcony(num) {
count = 1;
document.getElementById("balcony_calc").style.display = "block";
num_ = document.getElementById("balcony_img");
num_.src = '/assets/calc_ru/balcony/' + num +'/1.gif';
document.getElementById("balcony_button_prev").style.display = "block";
document.getElementById("balcony_button_prev").disabled = "disabled";
document.getElementById("balcony_button_next").style.display = "block";
document.getElementById("balcony_button_next").disabled = "";
}

function change_balcony_next(place, num) {
	count = count+1;
	num_ = document.getElementById("balcony_img");
	num_.src = '/assets/calc_ru/balcony/' + place +'/' + count + '.gif';
	if (count >= num) { 
		document.getElementById("balcony_button_next").disabled = "disabled";
		document.getElementById("balcony_button_prev").disabled = "";
	}
}

function change_balcony_prev(place, num) {
	count = count-1;
	num_ = document.getElementById("balcony_img");
	num_.src = '/assets/calc_ru/balcony/' + place +'/' + count + '.gif';
	if (count == 1) { 
		document.getElementById("balcony_button_prev").disabled = "disabled";
		document.getElementById("balcony_button_next").disabled = "";
	}
}

function get_balcony_img_src() {
	document.getElementById("balcony_img_src").value = document.getElementById("balcony_img").src;
}

function hide_balcony_data() {
	width_ = document.getElementById("bal_width");
	height_ = document.getElementById("bal_height");
	door_width = document.getElementById("bal_door_width");
	door_height = document.getElementById("bal_door_height");
	if (door_width.value == "") { alert("Вы не ввели значение ширины двери!"); width_.focus(); err = 1; };
	if (door_height.value == "") { alert("Вы не ввели значение высоты двери!"); height_.focus(); err = 1; };
	if (width_.value == "") { alert("Вы не ввели значение ширины окна!"); width_.focus(); err = 1; };
	if (height_.value == "") { alert("Вы не ввели значение высоты окна!"); height_.focus(); err = 1; };
	if ((width_.value != "")&&(height_.value !="")) err = 0;
	if (err != 1) {
	document.getElementById("balcony_calculation_div").style.display = "none";
	document.getElementById("balcony_contacts_div").style.display = "block";
	};
}


function add_balcony_frame(num) {
count = 1;
document.getElementById("balcony_frame_calc").style.display = "block";
num_ = document.getElementById("balcony_frame_img");
num_.src = '/assets/calc_ru/balcony_frame/' + num +'/1.gif';
document.getElementById("balcony_frame_button_prev").style.display = "block";
document.getElementById("balcony_frame_button_prev").disabled = "disabled";
document.getElementById("balcony_frame_button_next").style.display = "block";
document.getElementById("balcony_frame_button_next").disabled = "";
}

function change_balcony_frame_next(place, num) {
	count = count+1;
	num_ = document.getElementById("balcony_frame_img");
	num_.src = '/assets/calc_ru/balcony_frame/' + place +'/' + count + '.gif';
	if (count >= num) { 
		document.getElementById("balcony_frame_button_next").disabled = "disabled";
		document.getElementById("balcony_frame_button_prev").disabled = "";
	}
}

function change_balcony_frame_prev(place, num) {
	count = count-1;
	num_ = document.getElementById("balcony_frame_img");
	num_.src = '/assets/calc_ru/balcony_frame/' + place +'/' + count + '.gif';
	if (count == 1) { 
		document.getElementById("balcony_frame_button_prev").disabled = "disabled";
		document.getElementById("balcony_frame_button_next").disabled = "";
	}
}

function get_balcony_frame_img_src() {
	document.getElementById("balcony_frame_img_src").value = document.getElementById("balcony_frame_img").src;
}

function hide_balcony_frame_data() {
	width_ = document.getElementById("bal_fr_width");
	height_ = document.getElementById("bal_fr_height");
	width__ = document.getElementById("bal_fr_win_width");
	if (width_.value == "") { alert("Вы не ввели значение ширины конструкции!"); width_.focus(); err = 1; };
	if (height_.value == "") { alert("Вы не ввели значение высоты конструкции!"); height_.focus(); err = 1; };
	if (height_.value == "") { alert("Вы не ввели значение ширины боковых окон!"); width__.focus(); err = 1; };
	if ((width_.value != "")&&(height_.value !="")) err = 0;
	if (err != 1) {
	document.getElementById("balcony_frame_calculation_div").style.display = "none";
	document.getElementById("balcony_frame_contacts_div").style.display = "block";
	};
}

function check_balcony_frame() {
	name_ = document.getElementById("bal_fr_name");
	email_ = document.getElementById("bal_fr_email");
	city_ = document.getElementById("bal_fr_city");
		if (name_.value == "") {
			alert("Вы не ввели Ваше имя!");
			name_.focus();			
			return false;
		}
		if (email_.value == "") {
			alert("Вы не ввели Ваш email адрес!");
			email_.focus();			
			return false;
		}
		if(!email_.value.match(/^[\w]{1}[\w\.\-_]*@[\w]{1}[\w\-_\.]*\.[\w]{2,4}$/i)) { 
	        alert("Некоректный e-Mail адрес, проверьте, пожалуйста!");
			email_.focus();
			return false;
		}
		
		if (city_.value == "") {
			alert("Вы не ввели Ваш город!");
			city_.focus();			
			return false;
		}
return true;
}

function check_balcony() {
	name_ = document.getElementById("bal_name");
	email_ = document.getElementById("bal_email");
	city_ = document.getElementById("bal_city");
		if (name_.value == "") {
			alert("Вы не ввели Ваше имя!");
			name_.focus();			
			return false;
		}
		if (email_.value == "") {
			alert("Вы не ввели Ваш email адрес!");
			email_.focus();			
			return false;
		}
		if(!email_.value.match(/^[\w]{1}[\w\.\-_]*@[\w]{1}[\w\-_\.]*\.[\w]{2,4}$/i)) { 
	        alert("Некоректный e-Mail адрес, проверьте, пожалуйста!");
			email_.focus();
			return false;
		}
		
		if (city_.value == "") {
			alert("Вы не ввели Ваш город!");
			city_.focus();			
			return false;
		}
return true;
}