/* 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='/wp-content/themes/linasmatkasse/img/greybox/close.gif' alt='Stäng'/></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("<iframe id='GB_frame' src='"+url+"'></iframe>");

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

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

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

function GB_position() {
	var de = document.documentElement;
	var w = self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var h = self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
	var top = GB_get_YOffset();
	$("#GB_window").css({
		width:GB_WIDTH+"px",
		height:GB_HEIGHT+"px",
		left: ((w - GB_WIDTH)/2)+"px",
		top: top +((h - GB_HEIGHT)/2)+"px"
	});
	$("#GB_frame").css("height",GB_HEIGHT - 32 +"px");
	$("#GB_overlay").css({
		top: top
  });
}

function GB_get_YOffset(){
	if ('pageYOffset' in window){	// all browsers, except IE before version 9
		return window.pageYOffset;
	}
	else{							// Internet Explorer before version 9
		var zoomFactor = GB_GetZoomFactor();
		var scrollTop = Math.round (document.documentElement.scrollTop / zoomFactor);
		return scrollTop;
	 }
}

function GB_GetZoomFactor () {
	var factor = 1;
	if (document.body.getBoundingClientRect) {
		// rect is only in physical pixel size in IE before version 8 
		var rect = document.body.getBoundingClientRect ();
		var physicalW = rect.right - rect.left;
		var logicalW = document.body.offsetWidth;

		// the zoom level is always an integer percent value
		factor = Math.round ((physicalW / logicalW) * 100) / 100;
	}
	return factor;
}