var WindowObjectReference; // global variable
	var PrevUrl;//global variable for previous url of popUp
	
	function showTime(){
		var dd = new Date();
		var dh = dd.getHours();
		if(dh<10){
			dh="0"+dh.toString();	
		}
		var did = dh.toString() + ":00";
		var timeElem = document.getElementById(did);
		timeElem.style.backgroundColor = "cadetblue";
		//timeElem.focus();
		window.location.hash = did;
	}
	function popWindow(url,name){
		if(WindowObjectReference == null || WindowObjectReference.closed){
			WindowObjectReference = window.open(url,name,"resizable=yes,scrollbars=yes,status=yes");
		}else if(PrevUrl != url){
			WindowObjectReference = window.open(url,name,"resizable=yes,scrollbars=yes,status=yes");
			WindowObjectReference.focus();
		}else{
			WindowObjectReference.focus();
		}
		PrevUrl = url;
	}
	function checkSchedule(id){
		var e = '';//equipment id
		var i = '';//instructor id
		var t = '';//time selection
		var d = '';//date selection
		d = document.forms[0].date1.value;	
		var tLoc = id.search('_') + 1;
		t = id.slice(tLoc);
		if(id.charAt(0)=='e'){//selected aircraft
			e = id.slice(1,tLoc-1);
			var url = "popSchedule.php?EquipId="+e;
		}else{//selected instructor
			i = id.slice(1,tLoc-1);
			var url = "popSchedule.php?InstructorId="+i;
		}
		url = url + "&time="+t+"&date="+d;
		//sudo User Id?
		var sudoElem = document.forms[0].sudoUserId;
		var sudo = sudoElem.value;	
		if(sudo.length>0)	{
			url = url+"&sudoUserId="+sudo;
		}
		popWindow(url,'');
	}
	function changeDate(){
		var x = document.getElementById('date1').value;
		document.forms[0].newDate.value = x;
		document.forms[0].go.value="newDate";
		document.forms[0].submit();
	}
	function updateMySchedule(){
		document.forms[0].go.value="upMySch";
		document.forms[0].submit();
	}
	function checkCancel(elem,id,sch) {
		var d = Date.parse(Date());
		var e = Date.parse(sch);
		var f = e - d;
		if(f<0 & elem.checked==true) {
			alert("You cannot delete an appointment that is in the past.");
			elem.checked=false;
		}else if(f<86400000 && elem.checked==true) {
			var r = confirm("You are canceling your appointment within 24 hours. A fee may be assessed against your account. Are you sure you want to do this?");
			if(r){
				document.forms[0].cancelId.value = id;
				document.forms[0].go.value = "SchCancel";
				document.forms[0].submit();
			}else{
				elem.checked=false;
			}
		}else if(elem.checked==true) {
			var r = confirm("Do you wish to cancel this session from the schedule?");
			if(r){
				document.forms[0].cancelId.value = id;
				document.forms[0].go.value = "SchCancel";
				document.forms[0].submit();
			}else{
				elem.checked=false;
			}
		}
	}
	function addUser(){
		var url = "addUser.php";
		popWindow(url,'');
	}
	function nextDate(){
		document.forms[0].go.value="NextDate";
		document.forms[0].submit();
	}
	function prevDate(){
		document.forms[0].go.value="PrevDate";
		document.forms[0].submit();
	}
	function todayDate(){
		document.forms[0].go.value="TodayDate";
		document.forms[0].submit();
	}
	function addUserIF(){
		document.getElementById('iframeTitle').innerHTML = "<span style='font-size:14pt;color:blue;font-weight:bold'>Add User</span>"
		document.getElementById('iframe').innerHTML = "<iframe width='500' height='300' style='border:none' src='addUser.php'></iframe>";
	}
	function modUser(){
		document.getElementById('iframeTitle').innerHTML = "<span style='font-size:14pt;color:blue;font-weight:bold'>Modify User</span>"
		document.getElementById('iframe').innerHTML = "<iframe width='500' height='300' style='border:none' src='modUser.php'></iframe>";
	}
	function addAircraft(){
		document.getElementById('iframeTitle').innerHTML = "<span style='font-size:14pt;color:blue;font-weight:bold'>Add Aircraft</span>"
		document.getElementById('iframe').innerHTML = "<iframe width='500' height='300' style='border:none' src='addAircraft.php'></iframe>";
	}
	function modAircraft(){
		document.getElementById('iframeTitle').innerHTML = "<span style='font-size:14pt;color:blue;font-weight:bold'>Modify Aircraft</span>"
		document.getElementById('iframe').innerHTML = "<iframe width='500' height='300' style='border:none' src='modAircraft.php'></iframe>";
	}
	function showHistory(){
		var url = "historyReport/historyReport.php";
		popWindow(url,'');

	}
	function displayNote(id){
		var url = "popSchedule.php?id="+id;
		popWindow(url,"display Flight Data");

	}
	function modWeb(){
		document.getElementById('iframeTitle').innerHTML = "<span style='font-size:14pt;color:blue;font-weight:bold'>Modify Web Content</span>";
		document.getElementById('iframe').innerHTML = "<iframe width='900' height='900' style='border:none' src='tools/editContent.php'></iframe>";
	}
	function massEmailTool(){
		var url = "email/stepOne.php";
		popWindow(url,"Mass Email Tool");
	}
	var radioId;
	function checkRadio(id){
		if(document.getElementById(id).checked == true && id==radioId){
			document.getElementById(id).checked = false;
			radioId = '';
		}else{
			radioId = id;
		}
	}
	function loadEditor(id){
		document.getElementById(id).innerHTML = "<iframe src='examples/example.php?id="+id+" frameborder=0 style=\"width:500px;height:450px;position:absolute;z-index:999;\" />";
	}