if (browser.isIE) {
    x = window.event.x;
    y = window.event.y;
  }
  if (browser.isNS) {
    x = event.pageX;
    y = event.pageY;
  }
  winCtrl.xOffset = winCtrl.active.frame.offsetLeft - x;
  winCtrl.yOffset = winCtrl.active.frame.offsetTop  - y;

  // Set document to capture mousemove and mouseup events.

  if (browser.isIE) {
    document.onmousemove = winMoveDragGo;
    document.onmouseup   = winMoveDragStop;
  }
  if (browser.isNS) {
    document.addEventListener("mousemove", winMoveDragGo,   true);
    document.addEventListener("mouseup",   winMoveDragStop, true);
    event.preventDefault();
  }

  winCtrl.inMoveDrag = true;
}

function winMoveDragGo(event) {

  var x, y;

  if (!winCtrl.inMoveDrag)
    return;

  // Get cursor position.

  if (browser.isIE) {
    x = window.event.x;
    y = window.event.y;
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS) {
    x = event.pageX;
    y = event.pageY;
    event.preventDefault();
  }

  // Move window frame based on offset from cursor.

  winCtrl.active.frame.style.left = (x + winCtrl.xOffset) + "px";
  winCtrl.active.frame.style.top  = (y + winCtrl.yOffset) + "px";
}

function winMoveDragStop(event) {

  winCtrl.inMoveDrag = false;

  // Remove mousemove and mouseup event captures on document.

  if (browser.isIE) {
    document.onmousemove = null;
    document.onmouseup   = null;
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", winMoveDragGo,   true);
    document.removeEventListener("mouseup",   winMoveDragStop, true);
  }
}

//-----------------------------------------------------------------------------
// Window resizing.
//-----------------------------------------------------------------------------

function winResizeCursorSet(event) {

  var target;
  var xOff, yOff;

  if (this.parentWindow.isMinimized || winCtrl.inResizeDrag)
    return;

  // If not on window frame, restore cursor and exit.

  if (browser.isIE)
    target = window.event.srcElement;
  if (browser.isNS)
    target = event.target;
  if (target != this.parentWindow.frame)
    return;

  // Find resize direction.

  if (browser.isIE) {
    xOff = window.event.offsetX;
    yOff = window.event.offsetY;
  }
  if (browser.isNS) {
    xOff = event.layerX;
    yOff = event.layerY;
  }
  winCtrl.resizeDirection = ""
  if (yOff <= winCtrl.resizeCornerSize)
    winCtrl.resizeDirection += "n";
  else if (yOff >= this.parentWindow.frame.offsetHeight - winCtrl.resizeCornerSize)
    winCtrl.resizeDirection += "s";
  if (xOff <= winCtrl.resizeCornerSize)
    winCtrl.resizeDirection += "w";
  else if (xOff >= this.parentWindow.frame.offsetWidth - winCtrl.resizeCornerSize)
    winCtrl.resizeDirection += "e";

  // If not on window edge, restore cursor and exit.

  if (winCtrl.resizeDirection == "") {
    this.onmouseout(event);
    return;
  }

  // Change cursor.

  if (browser.isIE)
    document.body.style.cursor = winCtrl.resizeDirection + "-resize";
  if (browser.isNS)
    this.parentWindow.frame.style.cursor = winCtrl.resizeDirection + "-resize";
}

function winResizeCursorRestore(event) {

  if (winCtrl.inResizeDrag)
    return;

  // Restore cursor.

  if (browser.isIE)
    document.body.style.cursor = "";
  if (browser.isNS)
    this.parentWindow.frame.style.cursor = "";
}

function winResizeDragStart(event) {

  var target;

  // Make sure the event is on the window frame.

  if (browser.isIE)
    target = window.event.srcElement;
  if (browser.isNS)
    target = event.target;
  if (target != this.parentWindow.frame)
    return;

  this.parentWindow.makeActive();

  if (this.parentWindow.isMinimized)
    return;

  // Save cursor position.

  if (browser.isIE) {
    winCtrl.xPosition = window.event.x;
    winCtrl.yPosition = window.event.y;
  }
  if (browser.isNS) {
    winCtrl.xPosition = event.pageX;
    winCtrl.yPosition = event.pageY;
  }

  // Save window frame position and current window size.

  winCtrl.oldLeft   = parseInt(this.parentWindow.frame.style.left,  10);
  winCtrl.oldTop    = parseInt(this.parentWindow.frame.style.top,   10);
  winCtrl.oldWidth  = parseInt(this.parentWindow.frame.style.width, 10);
  winCtrl.oldHeight = parseInt(this.parentWindow.clientArea.style.height, 10);

  // Set document to capture mousemove and mouseup events.

  if (browser.isIE) {
    document.onmousemove = winResizeDragGo;
    document.onmouseup   = winResizeDragStop;
  }
  if (browser.isNS) {
    document.addEventListener("mousemove", winResizeDragGo,   true);
    document.addEventListener("mouseup"  , winResizeDragStop, true);
    event.preventDefault();
  }

  winCtrl.inResizeDrag = true;
}

function winResizeDragGo(event) {

 var north, south, east, west;
 var dx, dy;
 var w, h;

  if (!winCtrl.inResizeDrag)
    return;

  // Set direction flags based on original resize direction.

  north = false;
  south = false;
  east  = false;
  west  = false;
  if (winCtrl.resizeDirection.charAt(0) == "n")
    north = true;
  if (winCtrl.resizeDirection.charAt(0) == "s")
    south = true;
  if (winCtrl.resizeDirection.charAt(0) == "e" || winCtrl.resizeDirection.charAt(1) == "e")
    east = true;
  if (winCtrl.resizeDirection.charAt(0) == "w" || winCtrl.resizeDirection.charAt(1) == "w")
    west = true;

  // Find change in cursor position.

  if (browser.isIE) {
    dx = window.event.x - winCtrl.xPosition;
    dy = window.event.y - winCtrl.yPosition;
  }
  if (browser.isNS) {
    dx = event.pageX - winCtrl.xPosition;
    dy = event.pageY - winCtrl.yPosition;
  }

  // If resizing north or west, reverse corresponding amount.

  if (west)
    dx = -dx;
  if (north)
    dy = -dy;

  // Check new size.

  w = winCtrl.oldWidth  + dx;
  h = winCtrl.oldHeight + dy;
  if (w <= winCtrl.active.minimumWidth) {
    w = winCtrl.active.minimumWidth;
    dx = w - winCtrl.oldWidth;
  }
  if (h <= winCtrl.active.minimumHeight) {
    h = winCtrl.active.minimumHeight;
    dy = h - winCtrl.oldHeight;
  }

  // Resize the window. For IE, keep client area and frame widths in synch.

  if (east || west) {
    winCtrl.active.frame.style.width = w + "px";
    if (browser.isIE)
      winCtrl.active.clientArea.style.width = (w - winCtrl.active.widthDiff) + "px";
  }
  if (north || south)
    winCtrl.active.clientArea.style.height = h + "px";

  // Clip the title bar text, if necessary.

  if (east || west) {
    if (w < winCtrl.active.clipTextMinimumWidth)
      winCtrl.active.titleBarText.style.width = (winCtrl.minimizedTextWidth + w - winCtrl.active.minimumWidth) + "px";
    else
      winCtrl.active.titleBarText.style.width = "";
  }

  // For a north or west resize, move the window.

  if (west)
    winCtrl.active.frame.style.left = (winCtrl.oldLeft - dx) + "px";
  if (north)
    winCtrl.active.frame.style.top  = (winCtrl.oldTop  - dy) + "px";

  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
}

function winResizeDragStop(event) {

  winCtrl.inResizeDrag = false;

  // Remove mousemove and mouseup event captures on document.

  if (browser.isIE) {
    document.onmousemove = null;
    document.onmouseup   = null;
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", winResizeDragGo,   true);
    document.removeEventListener("mouseup"  , winResizeDragStop, true);
  }
}

//=============================================================================
// Utility functions.
//=============================================================================

function winFindByClassName(el, className) {

  var i, tmp;

  if (el.className == className)
    return el;

  // Search for a descendant element assigned the given class.

  for (i = 0; i < el.childNodes.length; i++) {
    tmp = winFindByClassName(el.childNodes[i], className);
    if (tmp != null)
      return tmp;
  }

  return null;
}

//=============================================================================
// Initialization code.
//=============================================================================

var winCtrl = new Object();

winCtrl.maxzIndex                        =   0;
winCtrl.resizeCornerSize                 =  16;
winCtrl.minimizedTextWidth               = 100;
winCtrl.inactiveFrameBackgroundColor     = "#c0c0c0";
winCtrl.inactiveFrameBorderColor         = "#f0f0f0 #505050 #404040 #e0e0e0";
winCtrl.inactiveTitleBarColor            = "#808080";
winCtrl.inactiveTitleTextColor           = "#c0c0c0";
winCtrl.inactiveClientAreaBorderColor    = "#404040 #e0e0e0 #f0f0f0 #505050";
winCtrl.inactiveClientAreaScrollbarColor = "";
winCtrl.inMoveDrag                       = false;
winCtrl.inResizeDrag                     = false;