//window.onload=showSubMenu;

// detect browser because IE has a specific behavior
var browserName  = navigator.appName;

function showSubMenu(id) {
  var sm = document.getElementById(id);
  var currentSubmenu = null;
  	//alert('0');
	for (var c = 1; c<=10; c++) {
		if ( document.getElementById('submenu'+c) ) {
			var currentElement = document.getElementById('submenu'+c);
			// doesn't work with IE which doesn't allow access to DOM
			var currentClass = currentElement.parentNode.getAttribute("class");
			if ( currentClass != "current" && currentElement ) {
			//alert('1');
				currentElement.style.display='none';
			}
			else {
			//alert('2');
				currentSubmenu = currentElement;
				currentSubmenu.style.display='block';
				currentElement.style.display='none';
			}
		}
	}
  if (sm && currentSubmenu) {
  //alert('3');
  	currentSubmenu.style.display='none';
    sm.style.display='block';
    
  }
  else if (sm && currentSubmenu == null) {
  //alert('4');
  	sm.style.display='block'; 	
  }
  // IE
  //else if ( (sm && browserName.indexOf("Microsoft") != -1) ) {
  //  sm.style.display='block'; 	
  //}
}

function hideSubMenu(id) {
  var sm = document.getElementById(id);
  if (sm) {
    //sm.style.display='none';
  }
}