$(document).click( function(event)
         {
                   var obj = event.target;
                   var pobj = obj.parentNode;
                   var id = obj.id;
          
                   if( obj.tagName == 'TD' || (obj.tagName != 'INPUT' && pobj.tagName == 'TD') )
                   {
                       if( id.substr(0, 4) == 'day-' )
                       {
                           event.preventDefault();
                           do_the_acting(obj);
                       }
                       else if( pobj.id.substr(0, 4) == 'day-' )
                       {
                           event.preventDefault();
                           do_the_acting(pobj);
                       }
                   }
               });

var obj = event.target;