function unGrayOut() {
	var dark = document.getElementById('darkenScreenObject');
	if (dark) {
		dark.style.display = 'none';
	}	 
	if ($('loading_def')) {
		$('loading_def').style.display = 'none';
	}
}
/**
 * This script can be used to gray-out a page, and show the 
 * animated loading image. 
 *
 * Note: 	Every page that wants to use this Javascrip needs to 
 * 			include the '/general/loading_def.jspx' file. This 
 *			file adds the 'loading_def' div that is switched on-
 * 			and-off by this script. 
 */
function grayOut(vis, options) {
	// If this is IE6 just show the animated gif, alpha settings look awfull.
	if (navigator.appName == 'Microsoft Internet Explorer') {
		var Browser = {
			Version : function() {
				var version = 999; // we assume a sane browser
				if (navigator.appVersion.indexOf("MSIE") != -1) {
					version = parseFloat(navigator.appVersion.split("MSIE")[1]);
				}
				return version;
			}
		}
		if (Browser.Version() == 6) {
			grayOutIE6(vis, options);
			return false;
		}
	}	
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout 
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {}; 
  var zindex = options.zindex || 50;
  var opacity = options.opacity || 25;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#FFF';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
        $('loading_def').style.display='block';
        $('loading_def').style.top='50%';
        $('loading_def').style.left='50%';
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height 
    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
        var pageWidth = document.body.scrollWidth+'px';
        var pageHeight = document.body.scrollHeight+'px';
    } else if( document.body.offsetWidth ) {
      var pageWidth = document.body.offsetWidth+'px';
      var pageHeight = document.body.offsetHeight+'px';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }   
    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;                      
    dark.style.MozOpacity=opaque;                   
    dark.style.filter='alpha(opacity='+opacity+')'; 
    dark.style.zIndex=zindex;        
    dark.style.backgroundColor=bgcolor;  
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';  
    $('loading_def').style.display='block';
  } else {
     dark.style.display='none';
     $('loading_def').style.display='none';
  }
  //document.write('<img src="/toeristiek/media/images/loading_def.gif" />');
}

function grayOutIE6(vis, options) {
	if (vis) {
		if ($('loading_def') != null) {
			$('loading_def').style.display = 'block';
			$('loading_def').style.position = 'absolute';
			$('loading_def').style.top='50%';
	        $('loading_def').style.left='50%';
	        $('loading_def').style.marginLeft = '-150px';
	        $('loading_def').style.marginTop = '-150px';
	        var img = $('loading_def').firstChild;
	        if (img) {
	        	$('loading_def').removeChild(img);
	        }	
	        img = document.createElement('img');
	        img.src = $('jsLabels:extImages').value +  $('jsLabels:language').value + '/loading_def.gif';
	        $('loading_def').appendChild(img);	
		}
	} else {
		if ($('loading_def') != null) {
			$('loading_def').style.display = 'none';
			$('loading_def').style.position = 'absolute';
			$('loading_def').style.top='50%';
	        $('loading_def').style.left='50%';
	        $('loading_def').style.marginLeft = '-150px';
	        $('loading_def').style.marginTop = '-150px';
		}
	}
}