// Window opener functions  v1.0.6
// documentation: http://www.dithered.com/javascript/window/index.html
// license: http://creativecommons.org/licenses/by/1.0/
// code by Chris Nott (chris[at]dithered[dot]com)


/*******************************************************************************
   Popup Window openers
*******************************************************************************/

var winReference = null;


// Open a window at a given position on the screen
function openPositionedWindow(url, name, width, height, x, y, status, scrollbars, moreProperties, openerName) {
   
   // ie 4.5 and 5.0 mac - windows are 2 pixels too short; if a statusbar is used, the window will be an additional 15 pixels short
   var agent = navigator.userAgent.toLowerCase();
   if (agent.indexOf("mac") != -1 && agent.indexOf("msie") != -1 && (agent.indexOf("msie 4") != -1 || agent.indexOf("msie 5.0") != -1) ) {
      height += (status) ? 17 : 2;
   }

   // Adjust width if scrollbars are used (pc places scrollbars inside the content area; mac outside) 
   width += (scrollbars != '' && scrollbars != null && agent.indexOf("mac") == -1) ? 16 : 0;

   var properties = 'width=' + width + ',height=' + height + ',screenX=' + x + ',screenY=' + y + ',left=' + x + ',top=' + y + ((status) ? ',status' : '') + ',scrollbars' + ((scrollbars) ? '' : '=no') + ((moreProperties) ? ',' + moreProperties : '');
   var reference = openWindow(url, name, properties, openerName);
   
   // resize window in ie if we can resize in ns; very messy
   // commented out because openPositionedWindow() doesn't set the resizable attribute
   // left in for reference
   /*if (resizable && agent.indexOf("msie") != -1) {
      if (agent.indexOf("mac") != -1) {
         height += (status) ? 15 : 2;
         if (parseFloat(navigator.appVersion) > 5) width -= 11;
      }
      else {
         height += (status) ? 49 : 31;
         width += 13;
      }
      setTimeout('if (reference != null && !reference.closed) reference.resizeTo(' + width + ',' + height + ');', 150);
   }*/

   return reference;
}


// Open a window at the center of the screen
function openCenteredWindow(url, name, width, height, status, scrollbars, moreProperties, openerName) {
   var x, y = 0;
   if (screen) {
      x = (screen.availWidth - width) / 2;
      y = (screen.availHeight - height) / 2;
   }
   if (!status) status = '';
   if (!openerName) openerName = '';
   var reference = openPositionedWindow(url, name, width, height, x, y, status, scrollbars, moreProperties, openerName);
   return reference;
}   


// Core utility function that actually creates the window and gives focus to it
function openWindow(url, name, properties, openerName) {

   // ie4.x pc can't give focus to windows containing documents from a different domain
   // in this case, initially load a local interstisial page to allow focussing before loading final url
   var agent = navigator.userAgent.toLowerCase();
   if (agent.indexOf("msie") != -1 && parseInt(navigator.appVersion) == 4 && agent.indexOf("msie 5") == -1 && agent.indexOf("msie5") == -1 && agent.indexOf("win") != -1 && url.indexOf('http://') == 0) {
      winReference = window.open('about:blank', name, properties);
      
      setTimeout('if (winReference && !winReference.closed) winReference.location.replace("' + url + '")', 300);
   }
   else {
      winReference = window.open(url, name, properties);
   }

   // ie doesn't like giving focus immediately (to new window in 4.5 on mac; to existing ones in 5 on pc)
   setTimeout('if (winReference && !winReference.closed) winReference.focus()', 200);
   
   if (openerName) self.name = openerName;
   return winReference;
}


/*******************************************************************************
   Modal Dialog controls
*******************************************************************************/

// Close a dialog
// Call from onunload event handler of any page that can create a dialog
function closeDialog(dialog) {
   if (dialog && dialog.closed != true) dialog.close();
}


// Close parent popup
// Call from onload event handler of any page that could be created from a dialog
function closeParentDialog() {
   if (top.opener && isWindowPopup(top.opener)) {
      root = top.opener.top.opener;
      top.opener.close();
      top.opener = root;
   }
}


// Check if a window is a popup
function isWindowPopup(win) {
   return ((win.opener) ? true : false);
}