first modify a form and develop a javascript. these javascirpt allow to navigate on several pictures with arrows.these arrows must be drag and drop on the pictures. this is developped for real estates. the position of the arrows on the picure must be saved. the target, allow the client to post his own pictures and makes himself a navigation though them. ex: first picture with a door, client drag and drop a button on the picture, these buttons allow to go on another picture, and go on ,...