var popup;

function popit(page, width, height, menubar, scrollbars){
	closeit();
	if(!menubar) menubar	= 'no';
	if(!scrollbars) scrollbars	= 'no';
  popup=window.open(page,'pop','width='+ width +',height='+ height +',resizable=yes,menubar='+ menubar +',status=no,scrollbars='+ scrollbars);
	popup.resizeTo(width, height);
	popup.focus();
}

function closeit(){
  if(popup){
    popup.close();
  }
}

function show_hide(show, hide){
	if(show){
		var item2show = document.getElementById(show);
		item2show.style.visibility = "visible";
		item2show.style.display = "block";
	}
	if(hide){
		var item2hide = document.getElementById(hide);
		item2hide.style.visibility = "hidden";
		item2hide.style.display = "none";
	}
}