update front.js
update front.js

shudong-sheng-sl/shudong-sheng-sl.github.io,angeliaz/Waterfall,MetSystem/Waterfall,shudong-sheng-sl/shudong-sheng-sl.github.io,MetSystem/Waterfall,MetSystem/Waterfall,shudong-sheng-sl/shudong-sheng-sl.github.io,angeliaz/Waterfall