for(i=1;i<=6;i++){$('help_dt_img_'+i).observe('click',function(event){var element=event.element();var regex=new RegExp("^help_dt_img_([0-9]+)$");var match=regex.exec(element.id);if(match!==null){key=match[1];$('help_dd_'+key).toggle();element.setAttribute('src',media_url+'img/'+($('help_dd_'+key).visible()?'hide':'show')+'.png');}});}