var PANEL_CONTENT_CLASS   = "panelcontent";
var PANEL_ANIMATION_DELAY = 20; /*ms*/
var PANEL_ANIMATION_STEPS = 10;

  function expandmenu(a){
    var e=document.getElementById(a);
	e.style.display="block"
  }


function animateTogglePanel(panel)
{
	var elements = document.getElementById(panel);
	var panelContent = null;
	for (var i=0; i < elements.length; i++)
	{
			panelContent = elements[i];
			break;
	}
 
	panelContent.style.display = "block";
	var contentHeight = panelContent.offsetHeight;
 
	if (panelContent.style.display == "none")
		panelContent.style.height = "0px";
 
	var stepHeight = contentHeight / PANEL_ANIMATION_STEPS;
	var direction = (!expanding ? -1 : 1);
 
	setTimeout(function(){animateStep(panelContent,1,stepHeight,direction)}, PANEL_ANIMATION_DELAY);
}