function HideFrm(id)
{
	var Item = document.getElementById(id);
	if (Item)
		Item.style.display = 'none';
}

function CloseFrm(id)
{
	var Item = document.getElementById(id);
	Item.remove();
}

function getJSON(url, callback) {
	var request = new XMLHttpRequest();
	request.open("GET", url);
	request.onload = function() {
		if(callback)
			callback(request);
	}
	request.responseType = 'json';
	request.send();
}

function postJSON(url, data, callback) {
	var request = new XMLHttpRequest();
	request.open("POST", url);
	//request.onreadystatechange = function() {
	request.onload = function() {
		if(request.readyState === 4 && callback)
			callback(request);
	}
	request.responseType = 'json';
	request.setRequestHeader("Content-Type", "application/json");
	//console.log(JSON.stringify(data));
	request.send(JSON.stringify(data));
}
 function SendReq()
{
	var FrmBlock = document.getElementById("IDFrmReqBlock");
	var BtnSend = document.getElementById("IDBtnSend");
	BtnSend.disabled = true;
	//var dWait = document.createElement('div');
	//FrmBlock.appendChild(dWait);
	//dWait.className = 'WaitingBlock';
	var lbSpec = document.getElementById('id_spec');
	var lbEForm = document.getElementById('id_eform');
	lbSpec.options[lbSpec.options.selectedIndex].value = lbSpec.options[lbSpec.options.selectedIndex].text;
	lbEForm.options[lbEForm.options.selectedIndex].value = lbEForm.options[lbEForm.options.selectedIndex].text;
	var Frm = document.getElementById("IDFrmReq");
	var frmData = new FormData(Frm);
	var frmJSON = Object.fromEntries(frmData.entries());
	//var rJSON = JSON.stringify(frmJSON, null, 2);	
	//console.log(frmJSON);
	postJSON("send_req.php", frmJSON, function(req){	
		//var newID = req.response;
		//alert('Заявка отправлена. В ближайшее время мы с Вами свяжемся. Спасибо.');
		//console.log(req.response['res']);
		//console.log(req.response);//alert(req.response['res']);
		HideFrm("IDFrmReqBlock");
		var dMainBlock = document.getElementById('MainBlock');
		var dInfo = document.createElement('div');
		dMainBlock.appendChild(dInfo);
		dInfo.className = 'Message';
		dInfo.innerHTML = 'Ваша заявка отправлена. В ближайшее время мы с Вами свяжемся. Благодарим за обращение.';
	});
}

function LoadPAForm()
{
	var lbSpec = document.getElementById('id_spec');
	var lbEForm = document.getElementById('id_eform');
	var url = './get_data.php?type=spec';
	var request = new XMLHttpRequest();
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		var rowsJSON = request.response;		
		var req = JSON.parse(rowsJSON);	
		//console.log(req);
		for(i = 0; i < req.rows.length; i++){
			var optn = new Option(req.rows[i].scode+"  "+req.rows[i].sname, req.rows[i].id_spec, false, false);
			//console.log(slink);			
			//lbSpec.options.appendChild(optn);
			lbSpec.options[lbSpec.options.length] = optn;
		}		
	};
	request.send();
	lbSpec.onchange = function() {
		LoadEForm(lbSpec.options[lbSpec.options.selectedIndex].value);
	}
}

function LoadEForm(idSpec)
{
	var lbEForm = document.getElementById('id_eform');
	lbEForm.options.length = 1;
	var url = './get_data.php?type=efs&val='+idSpec;
	var request = new XMLHttpRequest();
	request.open('GET', url);
	request.responseType = 'text';
	//request.responseType = 'json';
	request.onload = function() {
		var rowsJSON = request.response;
		var req = JSON.parse(rowsJSON);	
		//console.log(req);	id_eform, id_spec, efname	
		for(i = 0; i < req.rows.length; i++){
			var optn = new Option(req.rows[i].efname, req.rows[i].id_eform, false, false);
			//console.log(slink);			
			//lbSpec.options.appendChild(optn);
			lbEForm.options[lbEForm.options.length] = optn;
		}		
	};
	request.send();
}