// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// ===================================================================

// Set the position of the popup window based on the anchor
function PopupWindow_getXYPosition(anchorname) {
	var coordinates;
	if (this.type == "WINDOW") {
		coordinates = getAnchorWindowPosition(anchorname);
		}
	else {
		coordinates = getAnchorPosition(anchorname);
		}
	this.x = coordinates.x;
	this.y = coordinates.y;
	}
// Set width/height of DIV/popup window
function PopupWindow_setSize(width,height) {
	this.width = width;
	this.height = height;
	}
// Fill the window with contents
function PopupWindow_populate(contents) {
	this.contents = contents;
	this.populated = false;
	}
// Refresh the displayed contents of the popup
function PopupWindow_refresh() {
	if (this.divName != null) {
		// refresh the DIV object
		if (this.use_gebi) {
			document.getElementById(this.divName).innerHTML = this.contents;
			}
		else if (this.use_css) { 
			document.all[this.divName].innerHTML = this.contents;
			}
		else if (this.use_layers) { 
			var d = document.layers[this.divName]; 
			d.document.open();
			d.document.writeln(this.contents);
			d.document.close();
			}
		}
	else {
		if (this.popupWindow != null && !this.popupWindow.closed) {
			this.popupWindow.document.open();
			this.popupWindow.document.writeln(this.contents);
			this.popupWindow.document.close();
			this.popupWindow.focus();
			}
		}
	}
// Position and show the popup, relative to an anchor object
function PopupWindow_showPopup(anchorname) {
	this.getXYPosition(anchorname);
	this.x += this.offsetX;
	this.y += this.offsetY;
	if (!this.populated && (this.contents != "")) {
		this.populated = true;
		this.refresh();
		}
	if (this.divName != null) {
		// Show the DIV object
		if (this.use_gebi) {
			document.getElementById(this.divName).style.left = this.x;
			document.getElementById(this.divName).style.top = this.y;
			document.getElementById(this.divName).style.visibility = "visible";
			}
		else if (this.use_css) {
			document.all[this.divName].style.left = this.x;
			document.all[this.divName].style.top = this.y;
			document.all[this.divName].style.visibility = "visible";
			}
		else if (this.use_layers) {
			document.layers[this.divName].left = this.x;
			document.layers[this.divName].top = this.y;
			document.layers[this.divName].visibility = "visible";
			}
		}
	else {
		if (this.popupWindow == null || this.popupWindow.closed) {
			// If the popup window will go off-screen, move it so it doesn't
			if (screen && screen.availHeight) {
				if ((this.y + this.height) > screen.availHeight) {
					this.y = screen.availHeight - this.height;
					}
				}
			if (screen && screen.availWidth) {
				if ((this.x + this.width) > screen.availWidth) {
					this.x = screen.availWidth - this.width;
					}
				}
			this.popupWindow = window.open("about:blank","window_"+anchorname,"toolbar=no,location=no,status=no,menubar=no,scrollbars=auto,resizable,alwaysRaised,dependent,titlebar=no,width="+this.width+",height="+this.height+",screenX="+this.x+",left="+this.x+",screenY="+this.y+",top="+this.y+"");
			}
		this.refresh();
		}
	}
// Hide the popup
function PopupWindow_hidePopup() {
	if (this.divName != null) {
		if (this.use_gebi) {
			document.getElementById(this.divName).style.visibility = "hidden";
			}
		else if (this.use_css) {
			document.all[this.divName].style.visibility = "hidden";
			}
		else if (this.use_layers) {
			document.layers[this.divName].visibility = "hidden";
			}
		}
	else {
		if (this.popupWindow && !this.popupWindow.closed) {
			this.popupWindow.close();
			this.popupWindow = null;
			}
		}
	}
// Pass an event and return whether or not it was the popup DIV that was clicked
function PopupWindow_isClicked(e) {
	if (this.divName != null) {
		if (this.use_layers) {
			var clickX = e.pageX;
			var clickY = e.pageY;
			var t = document.layers[this.divName];
			if ((clickX > t.left) && (clickX < t.left+t.clip.width) && (clickY > t.top) && (clickY < t.top+t.clip.height)) {
				return true;
				}
			else { return false; }
			}
		else if (document.all) { // Need to hard-code this to trap IE for error-handling
			var t = window.event.srcElement;
			while (t.parentElement != null) {
				if (t.id==this.divName) {
					return true;
					}
				t = t.parentElement;
				}
			return false;
			}
		else if (this.use_gebi) {
			var t = e.originalTarget;
			while (t.parentNode != null) {
				if (t.id==this.divName) {
					return true;
					}
				t = t.parentNode;
				}
			return false;
			}
		return false;
		}
	return false;
	}

// Check an onMouseDown event to see if we should hide
function PopupWindow_hideIfNotClicked(e) {
	if (this.autoHideEnabled && !this.isClicked(e)) {
		this.hidePopup();
		}
	}
// Call this to make the DIV disable automatically when mouse is clicked outside it
function PopupWindow_autoHide() {
	this.autoHideEnabled = true;
	}
// This global function checks all PopupWindow objects onmouseup to see if they should be hidden
function PopupWindow_hidePopupWindows(e) {
	for (var i=0; i<popupWindowObjects.length; i++) {
		if (popupWindowObjects[i] != null) {
			var p = popupWindowObjects[i];
			p.hideIfNotClicked(e);
			}
		}
	}
// Run this immediately to attach the event listener
function PopupWindow_attachListener() {
	if (document.layers) {
		document.captureEvents(Event.MOUSEUP);
		}
	window.popupWindowOldEventListener = document.onmouseup;
	if (window.popupWindowOldEventListener != null) {
		document.onmouseup = new Function("window.popupWindowOldEventListener(); PopupWindow_hidePopupWindows();");
		}
	else {
		document.onmouseup = PopupWindow_hidePopupWindows;
		}
	}
// CONSTRUCTOR for the PopupWindow object
// Pass it a DIV name to use a DHTML popup, otherwise will default to window popup
function PopupWindow() {
	if (!window.popupWindowIndex) { window.popupWindowIndex = 0; }
	if (!window.popupWindowObjects) { window.popupWindowObjects = new Array(); }
	if (!window.listenerAttached) {
		window.listenerAttached = true;
		PopupWindow_attachListener();
		}
	this.index = popupWindowIndex++;
	popupWindowObjects[this.index] = this;
	this.divName = null;
	this.popupWindow = null;
	this.width=0;
	this.height=0;
	this.populated = false;
	this.visible = false;
	this.autoHideEnabled = false;
	
	this.contents = "";
	if (arguments.length>0) {
		this.type="DIV";
		this.divName = arguments[0];
		}
	else {
		this.type="WINDOW";
		}
	this.use_gebi = false;
	this.use_css = false;
	this.use_layers = false;
	if (document.getElementById) { this.use_gebi = true; }
	else if (document.all) { this.use_css = true; }
	else if (document.layers) { this.use_layers = true; }
	else { this.type = "WINDOW"; }
	this.offsetX = 0;
	this.offsetY = 0;
	// Method mappings
	this.getXYPosition = PopupWindow_getXYPosition;
	this.populate = PopupWindow_populate;
	this.refresh = PopupWindow_refresh;
	this.showPopup = PopupWindow_showPopup;
	this.hidePopup = PopupWindow_hidePopup;
	this.setSize = PopupWindow_setSize;
	this.isClicked = PopupWindow_isClicked;
	this.autoHide = PopupWindow_autoHide;
	this.hideIfNotClicked = PopupWindow_hideIfNotClicked;
	}


