/****
 GreyBox - The pop-up window thingie
   Copyright Amir Salihefendic 2006
 AUTHOR
   4mir Salihefendic (http://amix.dk) - amix@amix.dk
 VERSION
	 1.6 (17/02/06 17:55:45)
 LICENSE
  LGPL (read more in LGPL.txt)
 SITE
   http://amix.dk/greybox
****/
var GB_HEADER = null;
var GB_WINDOW = null;
var GB_IFRAME = null;
var GB_OVERLAY = null;
var GB_TIMEOUT = null;
var GB_HEIGHT = 400;
var GB_WIDTH = 400;
var x = navigator;
var browserdetails=x.userAgent;
var isie=-1;
var isfirefox=-1;
var issafari=-1;
isie=browserdetails.search(/MSIE/);
isfirefox=browserdetails.search(/Firefox/);
issafari=browserdetails.search(/Safari/);
var GB_caption = null;

//The url that was visited last
var GB_last_win_url = null;

function GB_show(url, height, width) {
  try {
    if(height != 'undefined')
      GB_HEIGHT = height;
    if(width != 'undefined')
      GB_WIDTH = width;
	initIfNeeded();
    GB_IFRAME.src = url;
    GB_IFRAME.opener = this;

   // GB_caption.innerHTML = "";

    GB_setPosition();
    if(GB_ANIMATION) 
    {
      positionRightVertically(GB_HEADER, -(GB_HEIGHT));
      positionRightVertically(GB_WINDOW, -(GB_HEIGHT));
    }

    showElement(GB_OVERLAY);
    showElement(GB_HEADER);
    showElement(GB_WINDOW);

    GB_setWidth();

    if(GB_ANIMATION) 
    {
      GB_animateOut(-GB_HEIGHT);
    }
    return false;
  }
  catch (e) 
  {
    return false;
  }
}

function GB_hide() 
{
  GB_IFRAME.src = "about:blank";
  removeElement(GB_IFRAME);
  hideElement(GB_WINDOW);
  hideElement(GB_HEADER);
}

function GB_varywindow()
{
	GB_animatein(0);
	//GB_hide();
}


function GB_setPosition() 
{
  positionRightVertically(GB_HEADER, 0);
  positionRightVertically(GB_WINDOW, 0);
  positionRightVertically(GB_OVERLAY,0);
}

function GB_animateOut(top) 
{
  if(top+getScrollTop() < 0) 
  {
    positionRightVertically(GB_WINDOW, top);
    positionRightVertically(GB_HEADER, top);
    GB_TIMEOUT = window.setTimeout(function() { GB_animateOut(top+50); }, 1);
  }
  else 
  {
    GB_WINDOW.style.top = getScrollTop()+"px";
    GB_HEADER.style.top = getScrollTop()+"px";
    clearTimeout(GB_TIMEOUT);
  }
}

function GB_animatein(top)
{
   hideElement(GB_OVERLAY);
  //alert(top+getScrollTop());
  if(top+getScrollTop() > ((-GB_HEIGHT)-60)) 
  {
    positionRightVertically(GB_WINDOW, top);
    positionRightVertically(GB_HEADER, top);
    GB_TIMEOUT = window.setTimeout(function() { GB_animatein(top-40); }, 1);
  }
  else 
  {
    //GB_WINDOW.style.top = getScrollTop()+"px";
    //GB_HEADER.style.top = getScrollTop()+"px";
    clearTimeout(GB_TIMEOUT);
    GB_hide();
  }
  return;
}

function GB_setWidth() 
{
  var array_page_size = GB_getWindowSize();

  //Set size
  GB_WINDOW.style.width = GB_WIDTH + "px";
  GB_IFRAME.style.width = GB_WIDTH + "px";
  GB_HEADER.style.width = ((GB_WIDTH+10)-GB_WIDTH) + "px";
  
  GB_WINDOW.style.height = GB_HEIGHT + "px";
  if(isie != -1)
  {
  GB_IFRAME.style.height = GB_HEIGHT + "px";
  }
  else
  {
  GB_IFRAME.style.height = GB_HEIGHT-5 + "px";
  }
  
  GB_OVERLAY.style.width = (array_page_size[0]) + "px";
  
  var max_height = Math.max(getScrollTop()+array_page_size[1], getScrollTop()+GB_HEIGHT+30);
  GB_OVERLAY.style.height = max_height + "px";

  GB_WINDOW.style.left = ((array_page_size[0] - GB_WINDOW.offsetWidth) /2) + "px";
//  GB_HEADER.style.left = ((array_page_size[0] - (GB_HEADER.offsetWidth))) + "px";
  
  if(isie != -1)
  {
  GB_HEADER.style.left = ((array_page_size[0] - (GB_HEADER.offsetWidth))/2)+354 + "px";
  }
  else if(isfirefox != -1)
  {
  GB_HEADER.style.left = ((array_page_size[0] - (GB_HEADER.offsetWidth))/2)+355 + "px";
  }
  else if(issafari != -1)
  {
  GB_HEADER.style.left = ((array_page_size[0] - (GB_HEADER.offsetWidth))/2)+355 + "px";
  }
  else
  {
  GB_HEADER.style.left = ((array_page_size[0] - (GB_HEADER.offsetWidth))/2)+355 + "px";
  }
  
  
}

function GB_init() 
{
  //Create the overlay
  GB_OVERLAY = DIV({'id': 'GB_overlay'});

  if(GB_overlay_click_close)
   //GB_OVERLAY.onclick = GB_hide;
	GB_OVERLAY.onclick =GB_varywindow;
  getBody().insertBefore(GB_OVERLAY, getBody().firstChild);

  //Create the window
  GB_WINDOW = DIV({'id': 'GB_window'});

  GB_HEADER = DIV({'id': 'GB_header', 'style':'cursor:pointer'},IMG({'src': '../images/closewindow.png', 'title': 'Close window'}));
  //GB_caption = DIV({'id': 'GB_caption'}, "");

  //var close = DIV({'id': 'GB_close', 'style':'cursor:pointer'},IMG({'src': '../images/closewindow.png', 'title': 'Close window'}));
  //GB_HEADER.onclick = GB_hide;
  GB_HEADER.onclick =GB_varywindow;
  //ACN(GB_HEADER, close);

  getBody().insertBefore(GB_WINDOW, GB_OVERLAY.nextSibling);
  getBody().insertBefore(GB_HEADER, GB_OVERLAY.nextSibling);

}

function initIfNeeded() 
{
  if(GB_OVERLAY == null) 
  {
    GB_init();
    GB_addOnWinResize(GB_setWidth);
    window.onscroll = function() { GB_setPosition(); };
  } 
  //Remove the old iFrame
  GB_IFRAME = IFRAME({'id': 'GB_frame', 'name': 'GB_frame'});
  ACN(GB_WINDOW, GB_IFRAME);
}

function GB_getWindowSize()
{
	var window_width, window_height;
	if (self.innerHeight) 
	{	// all except Explorer
		window_width = self.innerWidth;
		window_height = self.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientHeight) 
	{ // Explorer 6 Strict Mode
		window_width = document.documentElement.clientWidth;
		window_height = document.documentElement.clientHeight;
	}
	else if (document.body) 
	{ // other Explorers
		window_width = document.body.clientWidth;
		window_height = document.body.clientHeight;
	}	
	return [window_width, window_height];
}

function GB_addOnWinResize(func)
 {
  var oldonrezise = window.onresize;
  if (typeof window.onresize != 'function')
    window.onresize = func;
  else 
  {
    window.onresize = function() {
      oldonrezise();
      func();
    }
  }
} 

function positionRightVertically(elm, value) 
{
	//alert("value="+value);
	//alert(getScrollTop()+value);
	elm.style.top = getScrollTop()+value+"px";
}

function getScrollTop() 
{
  //From: http://www.quirksmode.org/js/doctypes.html
  var theTop;
  if (document.documentElement && document.documentElement.scrollTop)
      theTop = document.documentElement.scrollTop;
  else if (document.body)
      theTop = document.body.scrollTop;
  return theTop;
}