is_ie = !!(window.attachEvent && !window.opera);

function wopen(url, width, height) {
	if(!width) width = 50;
	if(!height) height = 50;
	if(is_ie){
		width = width + 20;
		height = height + 10;
	}
	window.open(url, '', "location=no,menubar=no,status=no,titlebar=no,toolbar=no,scrollbars=yes,width=" + width+",height=" + height);
}

function $() 
{
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) 
  {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }
}

function show(elemId)
{
var t=document.getElementById(elemId);
t.style.display= "block";
}

function hide(elemId) {
var t=document.getElementById(elemId);
t.style.display= "none";
}

/**
 * Это для свитчера москва-питер
 */
var switchers = {

	current_id: '',
	current_btn: '',
	current_page: '',
	
	init: function(names)
	{
		//document.write('<script type="text/javascript" src="/js/querystring.js"></script>');
		switchers.current_id = 'moscow';
		for(var i=0, length=names.length; i<length; i++){
			$(names[i]).onclick = function(){switchers.show(this.id); return false; };
			if(names[i] != switchers.current_id){
				switchers.hide(names[i]);
			}
		}
		switchers.show(switchers.current_id);
	},
	
	show: function(id)
	{
		if(switchers.current_id!=''){
			switchers.hide(switchers.current_id);
		}
		switchers.current_btn = $(id);
		switchers.current_btn.parentNode.className = 'active';
		switchers.current_page = $('page_'+id);
		switchers.current_page.style.display = 'block';
		switchers.current_id = id;
	},
	
	hide: function(id)
	{
		$(id).parentNode.className = '';
		$('page_'+id).style.display = 'none';
	}
};