var xmlhttp;
var lcdCount;
var firstTime=0;
function loadXMLDoc(params)
{
	var url = "lcdins.php"
	var urlCount = "lcdCount.php";
	ajaxObject = function() {
	try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch(e){
	try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch(e){
	try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch(e){
	try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e){
	try { return new XMLHttpRequest() } catch(e){
	throw new Error( "This browser does not support XMLHttpRequest." );
	}}}}}}
	xmlhttp = new ajaxObject();

	 //xmlhttp.onreadystatechange=xmlhttpChange;
	 xmlhttp.open("POST",url,false);
	 xmlhttp.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
	 xmlhttp.send(params);
	document.getElementById("displayresult").innerHTML = xmlhttp.responseText;
	if(firstTime==0){
		xmlhttp.open("POST",urlCount,false);
		 xmlhttp.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
		 xmlhttp.send(params);
		lcdCount = xmlhttp.responseText;
		firstTime=1;
		lcdCount--;
	}
}

function xmlhttpChange()
{
// if xmlhttp shows "loaded"
if (xmlhttp.readyState==4)
 {
 // if "OK"
 if (xmlhttp.status==200)
   {
	document.getElementById("displayresult").innerHTML = xmlhttp.responseText;
   }
 else
   {
	document.getElementById("displayresult").innerHTML = "Problem retrieving XML data";
   }
 }
}

function LCDAdd(id,typeid){
	if(lcdCount<5){
		var params = "mode=add&id="+id+"&typeid="+typeid;
		loadXMLDoc(params);
		lcdCount++;
	}else{
		alert("Slot เต็มแล้วกรุณาลบโน้้ตบุ้คที่ท่านเลือกไว้แล้ว");
		lcdCount=5;
	}
	
}
function LCDRemove(id,typeid){
	lcdCount--;
	var params = "mode=del&id="+id+"&typeid="+typeid;
	loadXMLDoc(params);
}
function LCDClear(){
	lcdCount=0;
	var params = "mode=clear";
	loadXMLDoc(params);
}
function LCDClearmor(){
	lcdCount=0;
	var params = "mode=clear_mor";
	loadXMLDoc(params);
}
function LCDRefresh(){
	var params = "mode=refresh";
	loadXMLDoc(params);
}