// Global for browser version branching.
var Nav4 = ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4));

// One object tracks the current modal dialog opened from this window.
var dialogWin = new Object();

// Generate a modal dialog.  Parameters:
//    url -- URL of the page/frameset to be loaded into dialog
//    width -- pixel width of the dialog window
//    height -- pixel height of the dialog window
//    returnFunc -- reference to the function (on this page) that is to
//                  act on the data returned from the dialog
//    args -- [optional] any data you need to pass to the dialog
function openDGDialog(url, width, height, returnFunc, args) {
 if (!dialogWin.win || (dialogWin.win && dialogWin.win.closed)) {

  // Initialize properties of the modal dialog object.
  dialogWin.returnFunc = returnFunc;
  dialogWin.returnedValue = "";
  dialogWin.args = args;
  dialogWin.url = url;
  dialogWin.width = width;
  dialogWin.height = height;

  // Keep name unique so Navigator doesn't overwrite an existing dialog.
  dialogWin.name = (new Date()).getSeconds().toString();
  if (url == '') {
   dialogWin.name = 'payer';
  }

  // For a color-picker window, put it on the lower right if it fits there.
  if (args == "CP") {
   if (dialogWin.width + 315 > screen.width / 2) {
    dialogWin.left = screen.width - dialogWin.width;
   } else {
    dialogWin.left = screen.width / 2 + 315;
   }
   if (dialogWin.height + 265 > screen.height / 2) {
    dialogWin.top = screen.height - dialogWin.height;
   } else {
    dialogWin.top = screen.height / 2 + 265;
   }
   var attr = "scrollbars=1,status=0,menubar=0,resizable=0,directories=0,personalbar=0,location=0,toolbar=0,width=" + dialogWin.width + ",height=" + dialogWin.height + ",left=" + dialogWin.left + ",top=" + dialogWin.top;

  // Otherwise, center the dialog on the screen or, for Mozilla, in its parent.
  } else {
   dialogWin.left = (screen.width - dialogWin.width) / 2;
   dialogWin.top = (screen.height - dialogWin.height) / 2;
   var attr = "scrollbars=1,status=0,menubar=0,resizable=0,directories=0,personalbar=0,location=0,toolbar=0,width=" + dialogWin.width + ",height=" + dialogWin.height + ",left=" + dialogWin.left + ",top=" + dialogWin.top;
  }

  // Generate the dialog and make sure it has focus.
  dialogWin.win = null;
  while (dialogWin.win == null) {
   dialogWin.win=window.open(dialogWin.url, dialogWin.name, attr);
  }
  dialogWin.win.focus();
 } else {
  dialogWin.win.focus();
 }
}

// Event handler to inhibit Navigator form element and IE link activity when
// dialog window is active.
function deadend() {
 if (dialogWin.win && !dialogWin.win.closed) {
  dialogWin.win.focus();
  return false;
 }
}

// Since links in IE4 cannot be disabled, preserve IE link onclick event
// handlers while they're "disabled."  Restore when re-enabling the main
// window.
var IELinkClicks;

// Disable form elements and links in all frames for IE.
function disableForms() {
 IELinkClicks = new Array()
 for (var h = 0; h < frames.length; h++) {
  for (var i = 0; i < frames[h].document.forms.length; i++) {
   for (var j = 0; j < frames[h].document.forms[i].elements.length; j++) {
    frames[h].document.forms[i].elements[j].disabled = true;
   }
  }
  IELinkClicks[h] = new Array();
  for (i = 0; i < frames[h].document.links.length; i++) {
   IELinkClicks[h][i] = frames[h].document.links[i].onclick;
   frames[h].document.links[i].onclick = deadend;
  }
  frames[h].window.onfocus = checkModal;
  frames[h].document.onclick = checkModal;
 }
}

// Restore IE form elements and links to normal behavior.
function enableForms() {
 for (var h = 0; h < frames.length; h++) {
  for (var i = 0; i < frames[h].document.forms.length; i++) {
   for (var j = 0; j < frames[h].document.forms[i].elements.length; j++) {
    frames[h].document.forms[i].elements[j].disabled = false;
   }
  }
  for (i = 0; i < frames[h].document.links.length; i++) {
   frames[h].document.links[i].onclick = IELinkClicks[h][i];
  }
 }
}

// Grab all Navigator events that might get through to form elements while
// dialog is open.  For IE, disable form elements.
function blockEvents() {
 if (Nav4) {
  window.captureEvents(Event.CLICK | Event.MOUSEDOWN | Event.MOUSEUP | Event.FOCUS);
  window.onclick = deadend;
 } else {
  disableForms();
 }
 window.onfocus = checkModal;
}

// As dialog closes, restore the main window's original event mechanisms.
function unblockEvents() {
 if (Nav4) {
  window.releaseEvents(Event.CLICK | Event.MOUSEDOWN | Event.MOUSEUP | Event.FOCUS);
  window.onclick = null;
  window.onfocus = null;
 } else {
  enableForms();
 }
}

// Invoked by onFocus event handler of EVERY frame, return focus to dialog
// window if it's open.
function checkModal() {
 setTimeout("finishChecking()", 50);
 return true;
}
function finishChecking() {
 if (dialogWin.win && !dialogWin.win.closed) {
  dialogWin.win.focus();
 }
}

// Close the dialog.
function closeme() {
 window.close();
}