$('#tbc_01').html('<%= escape_javascript(render(:partial => 'homeworks_list', :locals => {:homeworks => @homework_list, :homework_count => @obj_count, :bid => @bid} )) %>');
for(var i=1;i<=5;i++){$("#tb_"+i).removeClass().addClass("normaltab");}
$("#tb_3").removeClass().addClass("hovertab");