var tooltip = null; var current_element = null; function show_tooltip(left, top, width, height, element) { if( element == current_element ) return; current_element = element; hide_tooltip(); tooltip = window.createPopup(); tooltip.document.write(''); tooltip.document.body.innerHTML = element.getAttribute('title'); tooltip.show( left, top, width, height, element ); } function hide_tooltip() { if( tooltip == null ) return; tooltip.hide(); tooltip = null; current_element = null; }