function getElementsByClass (className) {
  var all = document.all ? document.all :
    document.getElementsByTagName('*');
  var elements = new Array();
  for (var e = 0; e < all.length; e++)
    if (all[e].className == className)
      elements[elements.length] = all[e];
  return elements;
}

function setMasks(){
	showing=false;
	var maskItems = getElementsByClass("mask");
	for(i=0;i<maskItems.length;i++){
		var maskItem = document.getElementById(maskItems[i].id);
		//alert(maskItem.id);
		//alert(parseInt(maskItem.style.minHeight));
		animate(maskItem, 'height', calcHeight(maskItem), parseInt(maskItem.style.minHeight), '')
	}
}