/* Greybox Redux
 * Required: http://jquery.com/
 * Written by: John Resig
 * Based on code by: 4mir Salihefendic (http://amix.dk)
 * License: LGPL (read more in LGPL.txt)
 */

var GB_ANIMATION=true;
var GB_DONE = false;
var GB_HEIGHT = 400;
var GB_WIDTH = 400;

function GB_show(caption, url, height, width) {
  GB_HEIGHT = height || 400;
  GB_WIDTH = width || 400;
  if(!GB_DONE) {
    $(document.body)
      .append("<div id='GB_overlay'></div><div id='GB_window'><div id='GB_caption'></div>"
        + "<img src='greybox/close.gif' alt='Close window'/></div>");
    $("#GB_window img").click(GB_hide);
    $("#GB_overlay").click(GB_hide);
    $(window).resize(GB_position);
    GB_DONE = true;
  }

  $("#GB_frame").remove();
  $("#GB_window").append("<div id='GB_frame'></div>");

  $("#GB_caption").html(caption);
  $("#GB_overlay").show();
  GB_position();

	$(window).scroll(gb_scroll);

  if(GB_ANIMATION)
    $("#GB_window").slideDown("medium");
  else
    $("#GB_window").show();
}

function GB_hide() {
  $("#GB_window,#GB_overlay").hide();
	$(window).scroll(null);
}

function GB_position() {
  var de = document.documentElement;
  var w = self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
  $("#GB_window").css({width:GB_WIDTH+"px",height:GB_HEIGHT+"px",
    left: ((w - GB_WIDTH)/2)+"px" });
  $("#GB_frame").css({width:GB_WIDTH - 8 +"px", height:GB_HEIGHT - 30 +"px"});
	gb_scroll();
}

function gb_scroll()
{
	if ($("#GB_overlay"))
	{
		left_pos=(typeof(document.body.scrollLeft)=='number' ? document.body.scrollLeft : window.pageXOffset)
		top_pos=(typeof(document.body.scrollTop)=='number' ? document.body.scrollTop : window.pageYOffset);
		$("#GB_overlay").css({left:left_pos+"px",top: top_pos+"px"});
		$("#GB_window").css({top:top_pos+20+"px"});
	}
}