Moving ScrollBar Vertical position by a specified number of pixels

[Marius]

Hi
How can I move the window scrollbar vertical position up or down by a specified number of pixels?
I'm using this function to get the scrollbar vertical position.

Code: Select all

// function to get scrollbar vertical position
function scrollY() {
  return window.pageYOffset ? window.pageYOffset : document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop;
}

Hi
There are various ways to set tthe scrollbar position. For example, you can use the scrollTo(x, y) function, or scrollTop property for vertical position.
The easiest way to scroll by a specified amount of pixels is to use the scrollBy(x, y) function (X for horizontally, Y for vertically).
So, you not need to get the current scrollbar position.

Code: Select all

// moves up by 100 pixels
window.scrollBy(0, -100);

- Positive values will scroll to the right and down the page. Negative values will scroll to the left and up the page.