upload images

Question

  we are creating a website but we do no how to upload images and save it into the webform as well in data base we are keeping dropdown list we will give the names of the images if we select one name from the dropdown list it should display the image on the webform if we want to add the new image then we will keep browse button and it should upload image and save it to the webform.

kindly please tell me code how to create.