just in case for anyone else , it woks in this way :
1. resize your actual picture that want to uploade in your gallery , you can resize in ACDsee on Manage/ batch/ resize and you can select more picture at the same time and resize’it at 800 – 600 , or in Photoshoop , I recomend Acdsee ,
2. then you can upload to your gallery and will create thumbnails automaticaly , and the main windows in java scrips will loaded at 100 % the dissapear
3. don’t forget to thanks me ??
Ice https://www.supereasy.ro
have a nice day