var popup = null;
function printer()
{
    try
     {
        if(popup!=null)
          popup.close();
     }
     catch(e){}
     popup =  window.open("/gothia/se/kontroll/skriv_ut_sidan/","available","menubar=1,taskbar=0,scrollbars=1,resizable=0,left=100,top=100,width=800,height=600");
     popup.focus();
}