// Main Header Code
var request= null;
var request2= null;
var historyVars = new Array();
var postVars = new Array();
var historyLocation = 0;
var movingAround = false;
var currentPage = "main";
var browserName = navigator.appName;
var currentLocation = 'main.php';
var currentMenu = 'none';
var classColorArray = new Array(5);
var classYearArray = new Array(5);
var newNews_id = null;
classColorArray[0] = null;
classColorArray[1] = '';
classColorArray[2] = '';
classColorArray[3] = '';
classColorArray[4] = '';
classYearArray[0] = null;
classYearArray[1] = '';
classYearArray[2] = '';
classYearArray[3] = '';
classYearArray[4] = '';

function createRequest()
{
	try {
		request = new XMLHttpRequest();
	} catch (trymicrosoft) {
		try {
			request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft) {
			try {
				request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (failed) {
				request = null;
			}
		}
	}

	if (request == null)
		alert("Error Creating Request Object!");
}

function createRequest2()
{
	try {
		request2 = new XMLHttpRequest();
	} catch (trymicrosoft) {
		try {
			request2 = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft) {
			try {
				request2 = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (failed) {
				request2 = null;
			}
		}
	}

	if (request2 == null)
		alert("Error Creating Request Object!");
}

function showSubDiv( page )
{
	if (document.getElementById("sub"+page+"").style.visibility == "hidden")
	{
		document.getElementById("sub"+page+"").style.visibility = "visible";
		while (document.getElementById("sub"+page+"").style.height < lines*10)
		{
			document.getElementById("sub"+page+"").style.height += 1;
		}
	}
	else
	{
		document.getElementById("sub"+page+"").style.visibility = "hidden";
		while (document.getElementById("sub"+page+"").style.height > 0)
		{
			document.getElementById("sub"+page+"").style.height -= 1;
		}
	}
}

function joinListServ( emailBox )
{
	if (emailBox.value == emailBox.defaultValue)
	{
		alert("Please enter your email address!");
		clearTB(emailBox);
		emailBox.focus();
	}
	else
	{
		if (echeck(emailBox.value))
		{
			createRequest2();
			var variables = "emailAddress="+emailBox.value+"";
			var url = "joinListServ.php";
			request2.open("POST",url,true);
			request2.onreadystatechange = submitListServ;
			request2.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
			request2.send(variables);
		}
		else
		{
			alert("You have entered an invalid email address. Please verify that it is correct.");
			emailBox.focus();
		}
	}
}

function submitListServ()
{
	if (request2.readyState == 4) {
		var responseData = request2.responseText;
		
		if (responseData.substring(0,8) == "complete")
		{
			alert("You have successfully been signed up for the listserv.");
		}
		else if (responseData.substring(0,6) == "joined")
		{
			alert("You have already been subscribed to the listserv.");	
		}
		else
		{
			alert("Join Failed. Server Returned: '" + responseData + "'");
		}
	}
}

function clearTB( textBox )
{
	if (textBox.value == textBox.defaultValue)
		textBox.value = '';
}

function saveNewsClip()
{
	if (document.editNews.newsSubject.value == '')
	{
		alert("You must specify a subject for this news clip.");
		document.editNews.newsSubject.focus();
	}
	else if (document.editNews.newsContent.value == '')
	{
		alert("You enter a description for this news clip.");
		document.editNews.newsContent.focus();
	}
	else
		document.editNews.submit();
}

function cycleNews( news_id )
{
	var url = "news.php?snippet="+news_id+"";

	if (news_id >= newsList.length)
		news_id = 0;

	for (var i=100;i>=0;i--)
	{
		if(document.all) 
			document.getElementById("newsBox").style.filter = "alpha(opacity=" + i + ")";
		else
			document.getElementById("newsBox").style.opacity = i/100;
	}

	document.getElementById("newsBox").innerHTML = newsList[news_id];

	for (var i=0;i<=100;i++)
	{
		if(document.all) 
			document.getElementById("newsBox").style.filter = "alpha(opacity=" + i + ")";
		else
			document.getElementById("newsBox").style.opacity = i/100;
		window.setTimeout("i+=0",100);
	}
	
	window.setTimeout("cycleNews("+(news_id+1)+")",4000);
}

function selectMenu( menuName )
{
	if (currentMenu != 'none')
   		eval('togglePopup'+currentMenu+'()');
   	
	currentMenu = menuName;
}

function removeEditDis()
{
	document.editing.pageDataTitle.disabled = false;
	document.editing.pageDataParent.disabled = false;
	document.editing.pageSetYear.disabled = false;
	document.editing.setPrivacy.disabled = false;
	document.editing.listPageAfter.disabled = false;
}

function getPage( url , page)
{
	createRequest();

	request.open("GET",url,true);

	request.onreadystatechange = updateMainPage;
	if ((page != currentPage)&&(page != 'login'))
	{
		if (currentPage != 'loginSuccess')
		{
			var oldView = document.getElementById(""+currentPage+"TabButton");
			oldView.src = oldView.src.replace("type=dark","type=light");

		}
		
		var newView = document.getElementById(""+page+"TabButton");		

		newView.src = newView.src.replace("type=light","type=dark");
	}
	if ((page != 'login')&&(page != 'loginSuccess'))
	{
		swapTabs(page);
		currentLocation = url;
//		setSideBar(page);
	}
	else
	{
//		setSideBar('main');
	}
	
	request.send(null);
}

function tabButtonMouseOut( tabButton , page)
{
	if 	(currentPage != page)
	{
		tabButton.src = tabButton.src.replace("type=dark","type=light");
	}
}

function tabButtonMouseOver(tabButton)
{
	if (tabButton.src.indexOf("type=light") == -1)
	{
//		alert (tabButton.src+":1");
		tabButton.src = tabButton.src = tabButton.src + "&type=dark";
//		alert (tabButton.src+":2");
	}
	else
	{
//		alert (tabButton.src+":3");
		tabButton.src = tabButton.src.replace("type=light","type=dark");
//		alert (tabButton.src+":4");
	}
}

function refreshPane()
{
	getPage(currentLocation,currentPage);
}

function setSideBar(page)
{
	if (page == 'buy')
		document.getElementById("sideBarImage").innerHTML = '<img src="images/sideBar_buy.png">';
	else if (page == 'contact')
		document.getElementById("sideBarImage").innerHTML = '<img src="images/sideBar_contact.png">';
	else if (page == 'user')
		document.getElementById("sideBarImage").innerHTML = '<img src="getImage.php?page=main">';
	else
		document.getElementById("sideBarImage").innerHTML = '<img src="getImage.php?page='+page+'">';
}

function swapTabs(page)
{
//	var currentImage = document.getElementById("tab_"+currentPage+"");
//	var nextImage = document.getElementById("tab_"+page+"");

//	document.getElementById("tabLayer_"+currentPage).innerHTML = genRolloverTabs(currentPage);
//	document.getElementById("tabLayer_"+page).innerHTML = genSolidTabs(page);
	currentPage = page;
}

function getClassIndex( year )
{
	var tempCalc = (year - 2006) % 4;
	
	if (tempCalc == 0)
		return 4;
	else
		return tempCalc;
}

function setAccents( classIndex )
{
	if (classIndex != null)
	{	
		document.getElementById("topAccent").src = 'images/accent_top_'+classColorArray[classIndex]+'.gif';
		document.getElementById("botAccent").src = 'images/accent_bot_'+classColorArray[classIndex]+'.gif';
	}
	else
	{
		document.getElementById("topAccent").src = 'images/accent_top_grey.gif';
		document.getElementById("botAccent").src = 'images/accent_bot_grey.gif';	
	}
}

function changeClass( classIndex )
{
	var tempClass = classYearArray[classIndex];

	location.href='http://classof'+tempClass+'.tamu.edu/';
}

function mouseOverChange( imgid )
{
	imgid.src = imgid.src.replace("off","on");
}

function mouseOutChange( imgid )
{
	imgid.src = imgid.src.replace("on","off");
}

function displayEvent( cal_id )
{
	screenX = screen.x;
	screenY = screen.y;
	winW = 300;
	winH = 475;
	if (browserName.indexOf("Microsoft")!=-1)
	{
		winX = document.body.clientWidth/2 - winW/2;
		winY = document.body.clientHeight/2 - winH/2;
	}
	else
	{
		winX = window.innerWidth/2 - winW/2;
		winY = window.innerHeight/2 - winH/2;
	}
	
	if (cal_id == 'new')
		var calUrl = "main.php?page=cal&addEvent=true";
	else
		var calUrl = "main.php?page=cal&cal_id="+cal_id+"";

	if (false)
	{
		window.open(calUrl,"","left="+winX+",top="+winY+",width="+winW+",height="+winH+"");
	}
	else
	{
		if (browserName.indexOf("Microsoft")!=-1)
		{
			document.all.eventWindow.style.top = winY;
			document.all.eventWindow.style.left = winX;
			document.all.eventWindow.innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+calUrl+"' allowtransparency='true' style='z-index:9999'></iframe>";
			if (parent.document.all.calMonth)
			{
				parent.document.all.calMonth.style.visibility = "hidden";
				parent.document.all.calYear.style.visibility = "hidden";
			}
			document.all.eventWindow.style.visibility = "visible";
		}
		else
		{	
			document.getElementById("eventWindow").style.top = winY;
			document.getElementById("eventWindow").style.left = winX;
			document.getElementById("eventWindow").innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+calUrl+"'></iframe>";
			document.getElementById("eventWindow").style.visibility = "visible";
		}

	}
}

function displayLogin()
{
	screenX = screen.x;
	screenY = screen.y;
	winW = 300;
	winH = 250;
	if (browserName.indexOf("Microsoft")!=-1)
	{
		winX = document.body.clientWidth/2 - winW/2;
		winY = document.body.clientHeight/2 - winH/2;
	}
	else
	{
		winX = window.innerWidth/2 - winW/2;
		winY = window.innerHeight/2 - winH/2;
	}

	var loginUrl = "/login.php?login=true&originalServer=http://www.sterlingaffairs.com/";

	if (false)
	{
		window.open(loginUrl,"","left="+winX+",top="+winY+",width="+winW+",height="+winH+"");
	}
	else
	{
		if (browserName.indexOf("Microsoft")!=-1)
		{
			document.all.eventWindow.style.top = winY;
			document.all.eventWindow.style.left = winX;
			document.all.eventWindow.innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+loginUrl+"' allowtransparency='true' style='z-index:9999'></iframe>";
			if (parent.document.all.calMonth)
			{
				parent.document.all.calMonth.style.visibility = "hidden";
				parent.document.all.calYear.style.visibility = "hidden";
			}
			document.all.eventWindow.style.visibility = "visible";
		}
		else
		{	
			document.getElementById("eventWindow").style.top = winY;
			document.getElementById("eventWindow").style.left = winX;
			document.getElementById("eventWindow").innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+loginUrl+"'></iframe>";
			document.getElementById("eventWindow").style.visibility = "visible";
		}

	}
}

function displayRSS()
{
	screenX = screen.x;
	screenY = screen.y;
	winW = 300;
	winH = 250;
	if (browserName.indexOf("Microsoft")!=-1)
	{
		winX = document.body.clientWidth/2 - winW/2;
		winY = document.body.clientHeight/2 - winH/2;
	}
	else
	{
		winX = window.innerWidth/2 - winW/2;
		winY = window.innerHeight/2 - winH/2;
	}

	var rssUrl = "news.php?addFeed=true";

	if (false)
	{
		window.open(rssUrl,"","left="+winX+",top="+winY+",width="+winW+",height="+winH+"");
	}
	else
	{
		if (browserName.indexOf("Microsoft")!=-1)
		{
			document.all.eventWindow.style.top = winY;
			document.all.eventWindow.style.left = winX;
			document.all.eventWindow.innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+rssUrl+"' allowtransparency='true' style='z-index:9999'></iframe>";
			if (parent.document.all.calMonth)
			{
				parent.document.all.calMonth.style.visibility = "hidden";
				parent.document.all.calYear.style.visibility = "hidden";
			}
			document.all.eventWindow.style.visibility = "visible";
		}
		else
		{	
			document.getElementById("eventWindow").style.top = winY;
			document.getElementById("eventWindow").style.left = winX;
			document.getElementById("eventWindow").innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+rssUrl+"'></iframe>";
			document.getElementById("eventWindow").style.visibility = "visible";
		}

	}
}

function displayNews( news_id )
{
	screenX = screen.x;
	screenY = screen.y;
	winW = 300;
	winH = 475;
	if (browserName.indexOf("Microsoft")!=-1)
	{
		winX = document.body.clientWidth/2 - winW/2;
		winY = document.body.clientHeight/2 - winH/2;
	}
	else
	{
		winX = window.innerWidth/2 - winW/2;
		winY = window.innerHeight/2 - winH/2;
	}
	
	if (news_id == 'new')
		var newsUrl = "main.php?page=news&addEvent=true";
	else
		var newsUrl = "main.php?page=news&snippet="+news_id+"";

	if (false)
	{
		window.open(newsUrl,"","left="+winX+",top="+winY+",width="+winW+",height="+winH+"");
	}
	else
	{
		if (browserName.indexOf("Microsoft")!=-1)
		{
			document.all.eventWindow.style.top = winY;
			document.all.eventWindow.style.left = winX;
			document.all.eventWindow.innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+newsUrl+"' allowtransparency='true' style='z-index:9999'></iframe>";
			if (parent.document.all.calMonth)
			{
				parent.document.all.calMonth.style.visibility = "hidden";
				parent.document.all.calYear.style.visibility = "hidden";
			}
			document.all.eventWindow.style.visibility = "visible";
		}
		else
		{	
			document.getElementById("eventWindow").style.top = winY;
			document.getElementById("eventWindow").style.left = winX;
			document.getElementById("eventWindow").innerHTML = "<iframe id='eventFrame' width='"+winW+"' border='0' frameborder='0' height='"+winH+"' src='"+newsUrl+"'></iframe>";
			document.getElementById("eventWindow").style.visibility = "visible";
		}

	}
}


function closeEvent()
{
	if (false)
		window.close();
	else
	{
		parent.document.getElementById("eventWindow").style.visibility = "hidden";
		if (browserName.indexOf("Microsoft")!=-1)
		{
			parent.document.all.calMonth.style.visibility = "visible";
			parent.document.all.calYear.style.visibility = "visible";
		}
		parent.document.getElementById("eventWindow").innerHTML = "";
	}
}

function refreshCal()
{
	if (false)
		window.opener.refreshPane();
	else
		parent.refreshPane();
}

function saveEvent()
{
	if (document.editEvent.calStart.value == "")
		alert("You must enter a date for this event.");
	else if (document.editEvent.calDescr.value == "")
		alert("Please enter a description for this event.");
	else if (document.editEvent.calLocation.value == "")
		alert("Please enter a location for this event.");
	else if ((document.editEvent.calHourStart.value == "none")||(document.editEvent.calMinStart.value == "none")||(document.editEvent.calAmPmStart.value == "none"))
		alert("Please select a valid start time.");
	else if ((document.editEvent.calHourStop.value == "none")||(document.editEvent.calMinStop.value == "none")||(document.editEvent.calAmPmStop.value == "none"))
		alert("Please select a valid stop time.");
	else if ((document.editEvent.calWorkers.value < 1)&&(document.editEvent.calPoints.value > 0))
		alert("In order to assign a point value to this event,\nyou must specify the number of workers needed.");
	else
	{
//		formFields = 'page=cal&savEvent='+document.editEvent.savEvent.value+'&calStart='+document.editEvent.calStart.value+'&calHourStart='+document.editEvent.calHourStart.value+'&calMinStart='+document.editEvent.calMinStart.value+'&calAmPmStart='+document.editEvent.calAmPmStart.value+'&calHourStop='+document.editEvent.calHourStop.value+'&calMinStop='+document.editEvent.calMinStop.value+'&calAmPmStop='+document.editEvent.calAmPmStop.value+'&calDescr='+document.editEvent.calDescr.value+'&calLocation='+document.editEvent.calLocation.value+'&calPoints='+document.editEvent.calPoints.value+'&calPrivate='+document.editEvent.calPrivate.value+'&calYear='+document.editEvent.calYear.value+'';		
//		submitDataPage('main.php','',formFields);

		document.editEvent.submit();	
	}
}

function verifyNumWorkers()
{
	if (document.editEvent.calWorkers.value < document.editEvent.currentWorkers.value)
	{
		workerOffset = document.editEvent.currentWorkers.value - document.editEvent.calWorkers.value;
		if (!(confirm("You have set the number of needed workers to a value\nless than the number currently signed up.\nDoing so will remove the last "+workerOffset+" members from the list.\n\nAre you sure that you wish to do this?")))
		{
			document.editEvent.calWorkers.focus();
		}
	}
}

function deleteEvent( cal_id )
{
	if (confirm("Are you sure that you want to delete this event?"))
		location.href='main.php?page=cal&delEvent='+cal_id+'';
}

function unsignupEvent( cal_id )
{
	if (confirm("This will remove you from working this event.  Are you sure?"))
		location.href='main.php?page=cal&unsignEvent='+cal_id+'';
}

function signupEvent( cal_id )
{
	if (confirm("This will sign you up to work this event.  Are you sure?"))
		location.href='main.php?page=cal&signEvent='+cal_id+'';
}

function genRolloverTabs(page)
{
	var divData = '<a href="#" onClick="getPage(\'main.php?page='+page+'\',\''+page+'\')"><img src="tabSelect.php?page='+page+'" id="tab_'+page+'" border="0" onMouseOver="this.src=\'tabSelect.php?type=rollover&page='+page+'\'" onMouseOut="this.src=\'tabSelect.php?page='+page+'\'" ></a>';

	return divData;
}

function genSolidTabs(page)
{
	var divData = '<a href="#" onClick="getPage(\'main.php?page='+page+'\',\''+page+'\')"><img src="tabSelect.php?page='+page+'&type=highlight" id="tab_'+page+'" border="0"></a>';

	return divData;
}

function updateMainPage()
{
	if (request.readyState == 4) {
		var roomList = request.responseText;
		var roomDropBox = document.getElementById("mainData");
		roomDropBox.innerHTML = roomList;
		var script = document.createElement('script');

		document.getElementsByTagName('head')[0].appendChild(script);  
		//loadingIndicator('ready');
		movingAround = false;
	}
}

function setCalendar()
{
	tempYear = document.getElementById("calYear").value;
	tempMonth = document.getElementById("calMonth").value;
	
	getPage('main.php?page=cal&calYear='+tempYear+'&calMonth='+tempMonth+'','cal');
}

function updateRoomPage()
{
	if (request.readyState == 4) {
		var roomList = request.responseText;
		var roomDropBox = document.getElementById("mainPageData");
		roomDropBox.innerHTML = roomList;
		var script = document.createElement('script');
		script.type = 'text/javascript';
		script.src = roomList;
		document.getElementsByTagName('head')[0].appendChild(script);  
		//loadingIndicator('ready');
		showRoomIps();
	}
}

function submitDataPage(url, type, variables)
{
	createRequest();

	request.open("POST",url,true);
	request.onreadystatechange = updateMainPage;
	request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	request.send(variables);
}


function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    //alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

/* - Photo Fade
var currentPhoto = 0;
var secondPhoto = 1;

var currentOpacity = new Array();
var imageArray = new Array("img1.jpg","img2.jpg","img3.jpg","img4.jpg","img5.jpg","img6.jpg","img7.jpg","img8.jpg");

var FADE_STEP = 2;
var FADE_INTERVAL = 10;
var pause = false;

function init() {
	currentOpacity[0]=99;
	for(i=1;i<imageArray.length;i++)currentOpacity[i]=0;
	mHTML="";
	for(i=0;i<imageArray.length;i++)mHTML+="<div id=\"photo\" name=\"photo\" class=\"mPhoto\"><img src=\"" + imageArray[i]  +"\"></div>";
	document.getElementById("mContainer").innerHTML = mHTML;

	if(document.all) {
		document.getElementsByName("photo")[currentPhoto].style.filter="alpha(opacity=100)";
	} else {
		document.getElementsByName("photo")[currentPhoto].style.MozOpacity = .99;
	}

	mInterval = setInterval("crossFade()",FADE_INTERVAL);
}

function crossFade() {
	if(pause)return;

	currentOpacity[currentPhoto]-=FADE_STEP;
	currentOpacity[secondPhoto] += FADE_STEP;

	if(document.all) {
		document.getElementsByName("photo")[currentPhoto].style.filter = "alpha(opacity=" + currentOpacity[currentPhoto] + ")";
		document.getElementsByName("photo")[secondPhoto].style.filter = "alpha(opacity=" + currentOpacity[secondPhoto] + ")";
	} else {
		document.getElementsByName("photo")[currentPhoto].style.MozOpacity = currentOpacity[currentPhoto]/100;
		document.getElementsByName("photo")[secondPhoto].style.MozOpacity =currentOpacity[secondPhoto]/100;
	}

	if(currentOpacity[secondPhoto]/100>=.98) {
		currentPhoto = secondPhoto;
		secondPhoto++;
		if(secondPhoto == imageArray.length)secondPhoto=0;
		pause = true;
		xInterval = setTimeout("pause=false",2000);
	}
}

function doPause()  {
	if(pause) {
		pause = false;
		document.getElementById("pauseBtn").value = "pause";
	} else {
		pause = true;
		document.getElementById("pauseBtn").value = "play";
	}
}
*/