selenium operations for the browser scroll bar

We actually automated testing process, is sure to encounter less than the current page display elements of our positioning. This requires Scroll down to show our element;

The scroll bar and buttons are not our positioning, it is necessary to use js script to do;

1. First is our Scroll down operations:

# Designed by js script; absolute coordinates of points by moving 
# coordinate origin (0, 0) 
get_driver.maximize_window ()          # maximize the window 
the time.sleep (3 ) 
get_js = " window.scrollTo (0,500); "      # write js script, the scroll bar to scroll to the 500 position, if there is more than js script will only execute the last one. 
get_driver.execute_script (get_js)     # execute js script

2. If you want to scroll down many times:

get_driver.maximize_window ()          # maximize the window 
the time.sleep (3 ) 
get_js = " window.scrollTo (0,200); "      # write js script, the scroll bar to the 300 position 
get_js1 = " window.scrollBy (0,300); "      # js script you need to perform multiple use scrollBy; pull down again to the 300 position 
get_driver.execute_script (get_js)     # execute js script 
get_driver.execute_script (get_js1)     # execute js script

 3. The positioning of the elements you want to display directly visible window:

get_driver.maximize_window ()          # maximize the window 
the time.sleep (3 ) 
get_js = " window.scrollTo (0,200); "      # write js script, the scroll bar to the 300 position 
get_js1 = " window.scrollBy (0,300); "      # js script you need to perform multiple use scrollBy; pull down again to the 300 position 
get_driver.execute_script (get_js)     # execute js script 
get_driver.execute_script (get_js1)     # execute js script