/* Popwin - Copyright Doug Ashbaugh 2005 */
// If you would like to use a custom loading image or close button reference them in the next two lines.
var loaderGraphic 		= 'loading.gif';		
var closeButGraphic 	= 'close.gif';
var nn6    				= document.getElementById&&!document.all;
var popwinDraggerObj 			= false; // Set drag true / false
var xCapture,yCapture; 	// Capture clicked X and Y coordinates.
var popwinValuesObj; 		// Variable to store all movement values.
var popwinShownCntr;	// Counts how many popwins are open so we do not slam IE during resize and drags if none are shown.		

function getPageScroll(){
	// Returns array with x,y page scroll values.
	var yScroll;
	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

function getPageSize(){
	// Returns array with page width, height and window width, height
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the popwin
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the popwin
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}
	

function hidePopwin(divName)
{
	//alert("hidePopwin...");
	//
    // hidePopwin()
    //
	
	try {
	
		objOverlay = document.getElementById('popwinOverlay');
		objPopwin = document.getElementById('popwin');
		
		var objContainer = document.getElementById(divName);
		var objPopwinContainer2 = document.getElementById('popwinContainer2');
		var objPopwinContainer3 = document.getElementById('popwinContainer3');
		var objStorage = document.getElementById('popwinStorage');
	
		// hide popwin and overlay
		objContainer.style.display = 'none';
		objPopwin.style.display = 'none';
		objOverlay.style.display = 'none';
		
		// Storage of previous popwin	
		objStorage.appendChild(objContainer);
		
		// Reset Container 3 inside Container 2
		objPopwinContainer3.style.left = objPopwinContainer2.style.left;
		objPopwinContainer3.style.top = objPopwinContainer2.style.top;
		
	
		// make select boxes visible
		selects = document.getElementsByTagName("select");
		for (i = 0; i != selects.length; i++) {
			selects[i].style.visibility = "visible";
		}
	
		// disable keypress listener
		document.onkeypress = '';
		
		popwinShownCntr--;
	
	} catch(e) {
		alert("ERROR in script popwin.js in function hidePopWin(" + divName + "): " + e);
	}
}

function initPopwin()
{
	//alert("initPopwin...");
	
	/*
	if (!document.getElementsByTagName){ return; }
	var anchors = document.getElementsByTagName("a");

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];

		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "popwin")){
			anchor.onclick = function () {showPopwin(this); return false;}
		}
	}
	*/

	var objBody = document.getElementsByTagName("body").item(0);
	
	// create storage container
	var objStorage = document.createElement("div");
	objStorage.setAttribute('id','popwinStorage');
	objStorage.style.display = 'none';
	objBody.insertBefore(objStorage, objBody.firstChild);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','popwinOverlay');
	//objOverlay.onclick = function () {hidePopwin(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
 	objOverlay.style.width = '100%';
	objOverlay.style.height = lgGetWinHeight();							    // DLA - resize height now at start of popwin
	objBody.insertBefore(objOverlay, objBody.firstChild);

	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();
	
	// create popwin div, same note about styles as above
	var objPopwin = document.createElement("div");
	objPopwin.setAttribute('id','popwin');
	objPopwin.style.display = 'none';
	objBody.insertBefore(objPopwin, objOverlay.nextSibling);
	
	// create container 1
	var objContainer1 = document.createElement("div");
	objContainer1.setAttribute('id','popwinContainer1');
	objPopwin.appendChild(objContainer1);
	
	// create container 2
	var objContainer2 = document.createElement("div");
	objContainer2.setAttribute('id','popwinContainer2');
	objContainer1.appendChild(objContainer2);
	
	// create container 3 (Drag Container)
	var objContainer3 = document.createElement("div");
	objContainer3.setAttribute('id','popwinContainer3');
	objContainer3.className = 'popwinContainer3';
	objContainer2.appendChild(objContainer3);
	
	// Resize handlers.
	// Need to modify this to support Firefox and Netscape. Must be last in this init else hoses 
	// other browsers for now...
	if (window.addEventListener) {
		// firefox
		window.addEventListener("resize", function(){self.popwinResize();}, false)
		window.addEventListener("scroll", function(){self.popwinResize();}, false)
	} else {
		// IE
		window.attachEvent("onresize", function(){self.popwinResize();});
		window.attachEvent("onscroll", function(){self.popwinResize();});
	}
	
	//alert('initPopwin() ran.');
}

function popwinResize(){
	if ( popwinShownCntr == 0 ) { 
	    return; 
	}
	var objOverlay = document.getElementById('popwinOverlay');
	objOverlay.style.height = lgGetWinHeight();
}

function lgGetWinHeight()
{
	var arrayPageSize = getPageSize();
	var altHeight = arrayPageSize[1];
	
	var theHeight;
	if (window.innerHeight) {
		theHeight=window.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) {
		theHeight=document.documentElement.clientHeight;
	} else if (document.body) {
		theHeight=document.body.clientHeight;
	}
	if ( altHeight > theHeight) {
		return(altHeight);
	} else {
		return(theHeight);
	}
}

function showPopwin(divName)
{
	//alert("showPopwin entry..." + divName);
	
	try {
		var objContainer = document.getElementById(divName);
		
		// prep objects
		var objPopwin = document.getElementById('popwin');
		var objOverlay = document.getElementById('popwinOverlay');
		var objPopwinContainer3 = document.getElementById('popwinContainer3');
		
		//var objCaption = document.getElementById('popwinCaption');
		//var objImage = document.getElementById('popwinImage');
		//var objLoaderGraphic = document.getElementById('loaderGraphic');
		//var objPopwinDetails = document.getElementById('popwinDetails');
	
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		
		// center loaderGraphic if it exists
		/*
		if (objLoaderGraphic) {
			objLoaderGraphic.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoaderGraphic.height) / 2) + 'px');
			objLoaderGraphic.style.left = (((arrayPageSize[0] - 20 - objLoaderGraphic.width) / 2) + 'px');
			objLoaderGraphic.style.display = 'block';
		}
		*/
	
		// set height of Overlay to take up whole page and show
		var theHeight;
		if (window.innerHeight) {
		theHeight=window.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) {
			theHeight=document.documentElement.clientHeight;
		} else if (document.body) {
			theHeight=document.body.clientHeight;
		}
		objOverlay.style.height = lgGetWinHeight();
		
		// objOverlay.style.height = (arrayPageSize[1] + 'px');
		objOverlay.style.display = 'block';
		
		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
		for (i = 0; i != selects.length; i++) {
			selects[i].style.visibility = "hidden";
		}
		
		// place div inside popwin
		objPopwinContainer3.appendChild(objContainer);
	
		// display div
		objContainer.style.display = 'block';
		objPopwin.style.display = 'block';
	
		popwinShownCntr++;
	} catch(e) {
		alert('ERROR in script popwin.js in function showPopwin(' + divName + ') Msg: ' + e);
	}
}

function showCurrentSettings(){
	try {
		if ( document.getElementById('currentNav') ) {
			document.getElementById('moodlyLogo').style.display='none'; 
			document.getElementById('currentNav').style.display='block';
		}
	} catch(e) {
		1;
	}
}

//alert("popwin.js loaded");