how to add custome marker icon for first 10 markers gmapv3

Question

hi every one , how to add custome marker icon first 10 markers i dont want see a-j labels . how to remove a-j label names pls  send me


am fallowing like this link 
http://www.c-sharpcorner.com/uploadfile/8911c4/how-to-draw-infinite-route-with-more-than-10-locations-on-go/


am fallowing above link code ..


pls how to add custom image for first 1- 10 markers on google maps  v3


pls give me answer any one