/* Functions shared between todd and webforms. Should not have dependencies on any todd/webforms libraries (including internals.js/api.js) */


/********************************************************************
   XMLHttpRequest
*/
/* Create a request object (aka ajax)
   ADDME: Probably needs to deal with multiple versions of the MSXML components
   */
function toddCreateRequestObject()
{
  var browser = navigator.appName;
  if(browser == "Microsoft Internet Explorer")
  {
    var ro = new ActiveXObject("Microsoft.XMLHTTP");
    //var ro = new ActiveXObject("MSXML2.XMLHTTP");
  }
  else
  {
    var ro = new XMLHttpRequest();
  }
  return ro;
}

function toddGetViewPortDimensions()
{
  if (self.innerHeight) // all except Explorer
    return { width: self.innerWidth, height: self.innerHeight };

  if (document.documentElement && document.documentElement.clientHeight) // Explorer 6 Strict Mode
    return { width: document.documentElement.clientWidth, height: document.documentElement.clientHeight };

  return { width: document.body.clientWidth, height: document.body.clientHeight };
}

// Prevent event from bubbling up
function toddDontPropagateEvent(theEvent)
{
  if(theEvent.stopPropagation)
  {
    if (theEvent.cancelable)
      theEvent.preventDefault();
    theEvent.stopPropagation();
  }
  else
  {
    theEvent.returnValue = false;
    theEvent.cancelBubble = true;
    if(theEvent.keyCode)
      theEvent.keyCode = 0;
  }
  return false;
}

function toddGetObjectPosX(obj)
{
  if (obj.getBoundingClientRect)
  {
    var bounds = obj.getBoundingClientRect();
    return bounds.left - document.documentElement.clientLeft;
  }

  // We don't need to count in border width for the requested object
  var addBorder = false;
  for(var x=0;obj;obj=obj.offsetParent)
  {
    x += obj.offsetLeft;
    if (addBorder && typeof obj.clientLeft != 'undefined')
      x += obj.clientLeft;
    addBorder = true;
  }
  return x;
}
function toddGetObjectPosY(obj)
{
  if (obj.getBoundingClientRect)
  {
    var bounds = obj.getBoundingClientRect();
    return bounds.top - document.documentElement.clientTop;
  }

  // We don't need to count in border width for the requested object
  var addBorder = false;
  for(var y=0;obj;obj=obj.offsetParent)
  {
    y += obj.offsetTop;
    if (addBorder && typeof obj.clientTop != 'undefined')
    {
      y += obj.clientTop;
    }
    addBorder = true;
  }
  return y;
}

function toddGetObjectScreenX(obj)
{
  var x=toddGetObjectPosX(obj);
  for(obj=obj.parentNode;obj;obj=obj.parentNode)
    if(obj.scrollLeft)
      x -= obj.scrollLeft;
  return x;
}

function toddGetObjectScreenY(obj)
{
  var y=toddGetObjectPosY(obj);
  for(obj=obj.parentNode;obj;obj=obj.parentNode)
    if(obj.scrollTop)
      y -= obj.scrollTop;
  return y;
}