function doShowHide (element) {
	  var item = null;
	  if (document.getElementById) {
		item = document.getElementById(element);
	  } else if (document.all){
		item = document.all[element];
	  } else if (document.layers){
		item = document.layers[element];
	  }

	  if (!item) {	  }
	  else if (item.style) {
		if (item.style.display == "none"){ item.style.display = ""; }
		else {item.style.display = "none"; }
	  }else{ item.visibility = "show"; }
}