// VARS USED IN THIS SCRIPT
var exclude=1;
var agt=navigator.userAgent.toLowerCase();
var win=0;var mac=0;var lin=1;
if(agt.indexOf('win')!=-1){win=1;lin=0;}
if(agt.indexOf('mac')!=-1){mac=1;lin=0;}
var lnx=0;if(lin){lnx=1;}
var ice=0;
var ie=0;var ie4=0;var ie5=0;var ie6=0;var com=0;var dcm;
var op5=0;var op6=0;var op7=0;
var ns4=0;var ns6=0;var ns7=0;var mz7=0;var kde=0;var saf=0;

var __ohw_dragging = false
var __ohw_cur_mouse_left = 0;
var __ohw_cur_mouse_top = 0;
var __ohw_start_mouse_left = 0;
var __ohw_start_mouse_top = 0;
var __ohw_start_elem_left = 0;
var __ohw_start_elem_top = 0;
var __ohw_cur_dragElement = null;
var __ohw_computing = false;
// END VARS

// START BROWSER DETECTION BEFORE ANYTHING ELSE HAS A CHANCE TO START
// browser detection (modified for ohw)
// script from javascripts.com
if(typeof navigator.vendor!="undefined" && navigator.vendor=="KDE"){
  var thisKDE=agt;
  var splitKDE=thisKDE.split("konqueror/");
  var aKDE=splitKDE[1].split("; ");
  var KDEn=parseFloat(aKDE[0]);
  if(KDEn>=2.2){
    kde=1;
    ns6=1;
    exclude=0;
    }
  }
else if(agt.indexOf('webtv')!=-1){exclude=1;}
else if(typeof window.opera!="undefined"){
  exclude=0;
  if(agt.indexOf("opera/5")!=-1||agt.indexOf("opera 5")!=-1){op5=1;}
  if(agt.indexOf("opera/6")!=-1||agt.indexOf("opera 6")!=-1){op6=1;}
  if(agt.indexOf("opera/7")!=-1||agt.indexOf("opera 7")!=-1){op7=1;}
  }
else if(typeof document.all!="undefined"&&!kde){
  exclude=0;
  ie=1;
  if(typeof document.getElementById!="undefined"){
    ie5=1;
    if(agt.indexOf("msie 6")!=-1){
      ie6=1;
      dcm=document.compatMode;
      if(dcm!="BackCompat"){com=1;}
      }
    }
  else{ie4=1;}
  }
else if(typeof document.getElementById!="undefined"){
  exclude=0;
  if(agt.indexOf("netscape/6")!=-1||agt.indexOf("netscape6")!=-1){ns6=1;}
  else if(agt.indexOf("netscape/7")!=-1||agt.indexOf("netscape7")!=-1){ns6=1;ns7=1;}
  else if(agt.indexOf("gecko")!=-1){ns6=1;mz7=1;}
  if(agt.indexOf("safari")!=-1 || (typeof document.childNodes!="undefined" && 
  typeof document.all=="undefined" && typeof navigator.taintEnabled=="undefined"))
  {mz7=0;ns6=1;saf=1;}
  }
else if((agt.indexOf('mozilla')!=-1)&&(parseInt(navigator.appVersion)>=4)){
  exclude=0;
  ns4=1;
  if(typeof navigator.mimeTypes['*']=="undefined"){
    exclude=1;
    ns4=0;
    }
  }
if(agt.indexOf('escape')!=-1){exclude=1;ns4=0;}
if(typeof navigator.__ice_version!="undefined"){exclude=1;ie4=0;}
// END BROWSER DETECTION

function vt_alinkOnLoad()
{
  if (opener != null)
  {  
    opener.name = "__ohw_main_window";
  }
  
  // signal any ppr event handlers that the page has loaded
  //document.body.__ohw_done_loading = "true";
} 

function vt_topicsOnLoad(forceNonDynamic)
{
  // signal any ppr event handlers that the page has loaded
  //document.body.__ohw_done_loading = "true";
  
  if (_vt_supportsDynamicContent() && !forceNonDynamic)
  {
    _vt_setupWindows();
    _vt_setupMouseListeners();
    
    // Make the view topic title the topic documents title  
    //if (parent && document.title)
    //{
    //  parent.document.title = document.title;
    // }
  }
}

function vt_launchAlink(loc)
{
  if (_vt_supportsDynamicContent())
  {
    _vt_launchContent(loc + "&vtDynamic=true");
    return;
  }
  
  _vt_launchWindow(loc, 
    'height=100,width=300,location=no,resizable=yes,status=no,toolbar=no,scrollbars=yes');
    
  return;
}

function vt_launchPopup(loc)
{
  if (_vt_supportsDynamicContent())
  {
    _vt_launchContent(loc);
    return;
  }

  _vt_launchWindow(loc, 
    'height=100,width=300,location=no,resizable=yes,status=no,toolbar=no,scrollbars=yes');
    
  return;
}

function _vt_launchWindow(loc, params)                   
{                                         
  window.open(loc, null, params);                    
} 

function _vt_launchContent(loc)
{
  // Get the content layer
  //var conWin = _vt_getWindow("_ohw_cnt");
  
  // Set minumum bounds
  //conWin.style.width = 225;
  //conWin.style.height = 100;
  //conWin.style.overflow = "auto";
  
  //OHWPageLoader.load(loc, conWin);
  
  // Fixup our table due to NS 4.7 bug
  var ohwTable = _vt_getWindow("_ohw_table");
  ohwTable.border = 1;
  
  var ifrm = _vt_getContentFrame();
  ifrm.location.replace("about:blank");
  ifrm.location.replace(loc);
  vt_openPresentationWindow();
  
  return true;
}

function vt_openPresentationWindow()
{
  //OHWPageLoader.elem.innerHTML = 
  //  OHWPageLoader.dynFrame.document.documentElement.innerHTML;
  
  var ohwDiv = _vt_getWindow("_ohw_prs");
  
  //alert("TOP: " + __ohw_cur_mouse_top);
  //ohwDiv.style.left = __ohw_cur_mouse_left ;
  //ohwDiv.style.top = __ohw_cur_mouse_top;
  
  // TEMP until we can come up with something better
  /*if (ohwDiv.document)
  {
    var addX = 0;
    var addY = 0;
    if (window.frames._ohw_content)
    {
      addX = window.frames._ohw_content.document.body.scrollLeft;
      addY = window.frames._ohw_content.document.body.scrollTop;
    }
    else
    {
      addX = document.body.scrollLeft;
      addY = document.body.scrollTop;
    }
    ohwDiv.style.left = addX + 50;
    ohwDiv.style.top = addY + 200;
  }
  else
  { 
    var addX = 0;
    var addY = 0;
    if (window.frames._ohw_content)
    {
      addX = window.frames._ohw_content.window.pageXOffset;
      addY = window.frames._ohw_content.window.pageYOffset;
    }
    else
    {
      addX = window.pageXOffset;
      addY = window.pageYOffset;
    }
    ohwDiv.style.left = addX + 50;
    ohwDiv.style.top = addY + 200;
  }*/
  
  
  ohwDiv.style.top = __ohw_cur_mouse_top + 10;
  ohwDiv.style.left = __ohw_cur_mouse_left + 10;
  
  ohwDiv.style.visibility = "visible";    
}

function vt_closePresentationWindow(e)
{
  // Make sure we dont close it right after opening the link!!
  var curElem = null;
  var hasNativeEvent = true;
  if (!e) 
  {
    e = event;
    curElem = event.srcElement;
    hasNativeEvent = false;
  }
  else
  {
    curElem = e.target;
  }
  while (curElem.tagName != "HTML")
  {
    if (curElem.tagName == "A")
      return;
    curElem = hasNativeEvent ? curElem.parentNode : curElem.parentElement;
  }

  if (__vt_windowOpen == true)
  {
    __vt_windowOpen = false;
    return;
  }
  
  var conWin = _vt_getWindow("_ohw_prs");
  if (conWin) {
    conWin.style.visibility = "hidden";
  }
  
  /*var ifrm = _vt_getContentFrame();
  if (ifrm)
  {
    //ifrm.style.width = 0;
  }*/
  
  __vt_windowOpen = false;
  
  return;
}

function _vt_getWindow(windowStr)
{
  var conWin = null;
  
  // IE/NS/MOZ get element out of frameset
  conWin = document.getElementById(windowStr);
  
  // IE get element in frameset
  if (!conWin)
  {
    if (window.frames._ohw_content)
      conWin = window.frames._ohw_content.document.getElementById(windowStr);
  }  
  
  // NW/MOZ get element in frameset
  if (!conWin)
  {
    if (window.frames._ohw_content)
    {
      conWin = window.frames._ohw_content.document.getElementById(windowStr);
    }
  }
    
  return conWin;
}

function _vt_getTopicFrame()
{
  var doc = null;
  if (window.frames._ohw_content)
  {
    doc = window.frames._ohw_content;
  }
  if (!doc)
  {
    doc = document;
  }
  return doc;
}

function _vt_getContentFrame()
{
  // Get the iframe
  var ohwFrame = null;
  if (window.frames._ohw_content)
    ohwFrame = window.frames._ohw_content.frames._ohw_render_frame;
  else
    ohwFrame = window.frames._ohw_render_frame;
  
  return ohwFrame;
}

var OHWPageLoader = new Object();

OHWPageLoader.load = function(url, elem)
{
  with (OHWPageLoader)
  {
    if (!this.dynFrame)
    {
      this.dynFrame =_vt_getContentFrame();
    }
    this.elem = elem;
    
    this.dynFrame.src = "about:blank";
    
    this.dynFrame.location.replace(url)
    setTimeout("_ohw_waitForContent()", 100);
  }
}

function _ohw_waitForContent()
{
  if (OHWPageLoader.dynFrame.document.body &&
      OHWPageLoader.dynFrame.document.body.__ohw_done_loading == "true")
  {
    OHWPageLoader.dynFrame.document.body.__ohw_done_loading = "false";
    vt_openPresentationWindow();
    return; 
  }
  setTimeout("_ohw_waitForContent()", 100);
}

function vt_genericClick(e)
{
  if (ns6)
    __vt_windowOpen = true;
  return false;
}

var __vt_windowOpen = false;

document.onclick = vt_closePresentationWindow;

// Scripts for dragging the windows

function _vt_startDrag(e)
{
  var curElem = null;
  var hasNativeEvent = true;
  if (!e) 
  {
    e = event;
    curElem = event.srcElement;
    hasNativeEvent = false;
  }
  else
  {
    curElem = e.target;
  }
  
  while (curElem.tagName != "HTML" && 
         curElem.className != "__ohw_draggable" &&
         curElem.className != "__ohw_not_draggable")
  {
    curElem = hasNativeEvent ? curElem.parentNode : curElem.parentElement;
  }
  
  if (curElem.className == "__ohw_draggable")
  {
    __ohw_dragging = true
    __ohw_cur_dragElement = curElem;
    __ohw_start_mouse_left = e.clientX;
    __ohw_start_mouse_top = e.clientY;
    __ohw_start_elem_left = parseInt(curElem.style.left + 0)
    __ohw_start_elem_top = parseInt(curElem.style.top + 0)
    return false;
  }
}

function _vt_dragWindow(e)
{ 
  var hasNativeEvent = true;
  if (!e) 
  {
    e = window.event;
    hasNativeEvent = false;
  }
  
  if (!hasNativeEvent)
  {
    var addX = 0;
    var addY = 0;
    if (window.frames._ohw_content)
    {
      addX = window.frames._ohw_content.document.body.scrollLeft;
      addY = window.frames._ohw_content.document.body.scrollTop;
    }
    else
    {
      addX = document.body.scrollLeft;
      addY = document.body.scrollTop;
    }
    __ohw_cur_mouse_left = e.clientX + addX;
    __ohw_cur_mouse_top = e.clientY + addY;
  }
  else
  { 
    var addX = 0;
    var addY = 0;
    if (window.frames._ohw_content)
    {
      addX = window.frames._ohw_content.window.pageXOffset;
      addY = window.frames._ohw_content.window.pageYOffset;
    }
    else
    {
      addX = window.pageXOffset;
      addY = window.pageYOffset;
    }
    __ohw_cur_mouse_left = e.clientX + addX;
    __ohw_cur_mouse_top = e.clientY + addY;
  }
  
  if (__ohw_dragging)
  {
    __ohw_cur_dragElement.style.left = 
      __ohw_start_elem_left + e.clientX - __ohw_start_mouse_left;
    __ohw_cur_dragElement.style.top =  
      __ohw_start_elem_top + e.clientY - __ohw_start_mouse_top;
    return false
  }
  
  /*else
  {
    var ohwDiv = _vt_getWindow("_ohw_prs");
    if (ohwDiv.style.visibility != "visible")
    {
      //ohwDiv.style.left = __ohw_cur_mouse_left ;
      //ohwDiv.style.top = __ohw_cur_mouse_top;
    }
    return false;
  }*/
  
}

function _vt_stopDrag(e)
{
  __ohw_dragging = false;
}

function _vt_setupMouseListeners()
{
  if (window.frames._ohw_content)
  {
    window.frames._ohw_content.document.onmousemove = _vt_dragWindow; 
    window.frames._ohw_content.document.onmousedown = _vt_startDrag;
    window.frames._ohw_content.document.onmouseup = _vt_stopDrag;
  }
  else
  {
    document.onmousemove = _vt_dragWindow; 
    document.onmousedown = _vt_startDrag;
    document.onmouseup = _vt_stopDrag;
  }
}

function _vt_supportsDynamicContent()
{
  return ie5 || ie6 || ns6 || saf || op7;
}

function _vt_setupWindows()
{
  /*var majDiv = document.createElement("div");
  majDiv.onclick="vt_genericClick(event)";
  majDiv.id = "_ohw_prs";
  majDiv.className = "__ohw_draggable";
  //majDiv.style.visibility = "hidden";
  majDiv.style.position = "absolute";
  
  var table = document.createElement("table");
  table.borderColor="black";
  table.border="1";
  table.cellspacing="0";
  table.bgColor="white";
  
  var upperTr = document.createElement("tr");
  var titleTd = document.createElement("td");
  titleTd.bgColor = "lightBlue";
  var titleDiv = document.createElement("div");
  titleDiv.style.cursor = "move";
  titleDiv.innerHTML = "OHW";
  titleTd.appendChild(titleDiv);
  upperTr.appendChild(titleTd);
  table.appendChild(upperTr);
  
  var lowerTr = document.createElement("tr");
  var contentTd = document.createElement("td");
  var iframe = document.createElement("iframe");
  iframe.name = "_ohw_render_frame";
  iframe.id = "_ohw_render_frame";
  iframe.frameBorder = "0";
  iframe.height = 75;
  iframe.width = 300;
  contentTd.appendChild(iframe);
  lowerTr.appendChild(contentTd);
  table.appendChild(lowerTr);
  
  majDiv.appendChild(table);
  
  alert(majDiv.outerHTML);
  var elem = document.createElement("div");
  elem.innerHTML = "<div onclick='vt_genericClick(event)' id ='_ohw_prs'" +
                  " class='__ohw_draggable' style='visibility: hidden; position: absolute'>" +
                  "<table borderColor='black' border='1' cellspacing='0' bgColor='white'>" + 
                  "<tr><td bgColor='lightBlue'><div id='' style='cursor: move'>OHW</div></td></tr>" + 
                  "<tr><td><div id='__ohw_iframe_holder'>" + 
                  // Bug in mozilla, can't do this or it will load forever
                  //"<iframe name='_ohw_render_frame' id='_ohw_render_frame'" + 
                  //" frameborder='0' height='75' width='300'>foo</iframe>" + 
                  "</div></td></tr></table></div>";
  document.body.appendChild(elem);*/
}