// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
// see usage.txt for more information on this file

// 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";
if (this.needIframeHelper()) {
  document.getElementById(this.divName).style.zIndex = TOP_Z_INDEX;
}
}
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";
if (this.needIframeHelper()) {
  document.all[this.divName].style.zIndex = TOP_Z_INDEX;
}
}
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";
if (this.needIframeHelper()) {
  document.layers[this.divName].zIndex = TOP_Z_INDEX;
}
}
  
  if (this.needIframeHelper()) {
  showIframeHelper(this.iframeId,this.x,this.y,this.width,this.height);
  }
  }
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)) {
            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";
}
}
if (this.needIframeHelper()) {
  hideIframeHelper(this.iframeId);
  }
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;
}
}

function PopupWindow_needIframeHelper()
{
  // alert(this.use_IframeHelper);
  if (this.use_IframeHelper != "undefined") {
    return this.use_IframeHelper;
  }
  
  // Show the iframe behind the div for IE browers
var Opera = ((document.all)&&(navigator.userAgent.indexOf("Opera")!=-1)) ? true : false;
var IE5   = !Opera && ((document.all)&&(navigator.userAgent.indexOf("MSIE 5.")!=-1)) ? true : false;
  var IE6   = !Opera && ((document.all)&&(navigator.userAgent.indexOf("MSIE 6.")!=-1)) ? true : false;
  this.use_IframeHelper = (IE5 || IE6) && this.iframeId.length && document.getElementById(this.iframeId);
  // alert("here:" + this.use_IframeHelper);
}

// 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;
this.needIframeHelper = PopupWindow_needIframeHelper;

this.use_IframeHelper = "undefined"
this.iframeId = "iframeHelper";  // id of the iframe to use behind the div.
}