function grayOut(vis, options) {
  // 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 || 70;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  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
    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%';
    }   
	//alert(pageHeight);
	var pageHeight='100%';
	var pageWidth='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';
    document.body.style.overflow = "hidden"; 
  } else {
     dark.style.display='none';
     document.body.style.overflow = "auto";
  }
}


function toggleSettings(state) {
	grayOut(state);
	
	document.getElementById("settings_layer").style.zIndex = 20000000;
	//Effect.BlindDown(document.getElementById("settings_layer"));
	document.getElementById("settings_layer").style.display = "block";
	
}


function selectItemSetting(itemid, type, countryid) {
	document.getElementsByName(type + '_setting')[itemid].checked = true;
	
	if (countryid != undefined)
		fetchLanguagesForCountry(countryid);
}

function fetchLanguagesForCountry(countryid) {
	var url = 'settings/language?settings_query_country=' + countryid;
	new Ajax.Request(url, {
		onSuccess: function(transport) {
	    	if (transport.responseText != '') {
	    		document.getElementById('settings_list_language').innerHTML = transport.responseText;
	    	}
	  	}
	});
}

function saveEnviromentSettings(controller) {
	// Get the country
	for (i = 0; i < document.getElementsByName('country_setting').length; i++) {
		if (document.getElementsByName('country_setting')[i].checked == true)
			country = document.getElementsByName('country_setting')[i].value;
	}
	
	// Get the language
	for (i = 0; i < document.getElementsByName('language_setting').length; i++) {
		if (document.getElementsByName('language_setting')[i].checked == true)
			language = document.getElementsByName('language_setting')[i].value;
	}
	
	// Get current url
	//alert(getURLParameter('lang'));	
	
	// Build url
	if (controller == 'detail') 
		url = 'detail?lang=' + language + '&default_country=' + country + '&itemid=' + getURLParameter('itemid');
	if (controller == 'home')
		 url = 'index?lang=' + language + '&default_country=' + country;
	if (controller == 'list')
		 url = 'index?lang=' + language + '&default_country=' + country;
	if (controller == 'map')
		 url = 'map?lang=' + language + '&default_country=' + country;
	if (controller == 'search')
		 url = 'search?lang=' + language + '&default_country=' + country;
	
	// Redirect the user
	location.href = url;
	
}