trustieforge/app/views/homework_common/programing_test.js.erb

$("#test_send_<%= @index%>").replaceWith("<a class='<%= @result == 0 ? 'green_btn' : 'red_btn'%> fl ml5 mt1' onclick='programing_test(<%= @index%>)' id='test_send_<%= @index%>'><%= @result == 0 ? '正确' : '错误'%></a>");
$("#test_result_<%= @index%>").val("<%= @result%>");