function switchDiv( first, second ){
    document.getElementById(first).style.display = 'none';
    document.getElementById(second).style.display = 'block';
}

function change_pic( obj, pic ){
    obj.src = pic;
}

function getElementsByClassName(className, tag, elm){
	var testClass = new RegExp("(^|\\s)" + className + "(\\s|$)");
	var tag = tag || "*";
	var elm = elm || document;
	var elements = (tag == "*" && elm.all)? elm.all : elm.getElementsByTagName(tag);
	var returnElements = [];
	var current;
	var length = elements.length;
	for(var i=0; i<length; i++){
		current = elements[i];
		if(testClass.test(current.className)){
			returnElements.push(current);
		}
	}
	return returnElements;
}

var prevSubmenu = '';
var currentSubmenu = '';

function submenu(name){
  var all = document.all ? document.all : document.getElementsByTagName('*');
  for (var e = 0; e < all.length; e++){
      //document.getElementById('debug').innerHTML = document.getElementById('debug').innerHTML  + j + '<br />';
      if (all[e].className == 'sub ' + name){
          all[e].style.display = 'block';
      }        
      if( all[e].className == 'sub ' + currentSubmenu && ( name != currentSubmenu ) ){
        all[e].style.display = 'none';
      }        
  }
  prevSubmenu = currentSubmenu;
  currentSubmenu = name;
}

function d( text ){ document.getElementById('debug').innerHTML = text; }