function show(id){

	//alert(id);
	//alert('menu_id_' + id);

	/*var t = new Array (4,6,7,10,11,12,13,15,20);
	for (var i = 0; i < t.length; i++){
		if (t[i] == id) continue;
		var e = document.getElementById('menu_id_' + t[i]);
		e.style.display = 'none';

	}*/



	var elements = getElementByClass('div','hidden_sub_menu');

	for (var i = 0; i < elements.length; i++){
		if (elements[i].id == 'menu_id_' + id) continue;
		//var e = document.getElementById('menu_id_' + t[i]);
		//alert(elements[i].style.display);
		elements[i].style.display = 'none';
	}
	var element = document.getElementById('menu_id_' + id);
	if (element.style.display == 'block') element.style.display = 'none';
	else element.style.display = 'block';



}

function getElementByClass(tagName,className){
   var tags = document.getElementsByTagName(tagName);
   var finds = [];   for(var i = 0, len = tags.length;i < len;++i){
      if(tags[i].className.indexOf(className) != -1)
         finds.push(tags[i]);
   }
   return finds;
}