$(document).ready(function(){
         var difference = $('#right_content_body_text').height() - $('#right_content').height();
         var margintop = 0;
         $('#right_content')
 		.mousewheel( function (event, delta)
  		{
 		    if( ( margintop <= 0 ) && ( margintop + difference >= 0 ) )
 		    {
 		        $('#right_content_body_text').stop();
 			    if ( delta < 0 ){
 				        margintop -= 60;
 				        $('#right_content_body_text').animate({'marginTop':margintop},
                              function()
                             {
                                 if( difference + margintop < 0 ) {
                                     margintop = -difference;
                                     $('#right_content_body_text').animate({'marginTop':margintop})
                                 }
                             });
 				    }
 			    else if ( delta > 0 ){
 				    margintop+=60;
                     $('#right_content_body_text')
                         .animate({'marginTop':margintop},
                              function()
                             {
                                 if( margintop > 0 ) {
                                     margintop=0;
                                     $('#right_content_body_text').animate({'marginTop':margintop})
                                 }
                             });
 			    }
 			}
 		    event.stopPropagation();
 		    event.preventDefault();
 		});
     });