var ddmenuitem = 0;

function jsddm_open()
{  jsddm_close();
   ddmenuitem = $(this).parent().find('.jsddm').css('visibility', 'visible');
   return false;}

function jsddm_close()
{  $(ddmenuitem).css('visibility', 'hidden');}

$(document).ready(function()
{  $('.butDownload').bind('click', jsddm_open)});

document.onclick = jsddm_close;