function show(obj)
{
	var el = document.getElementById(obj);
	
	if ( el.style.display == "none" ) 
	{
		// show the element at the mouse pointer
		el.style.display = '';
	}else {
		// make the element disappear
		el.style.display = 'none';
	}// end if else !=
}// end functon showHide()