Identifying the uppermost object visible at top of page while scrolling

[craigslist.jg]

Is this possible?

+--------------------------------
| * here
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Say the above is a webpage, and I'm halfway through scrolling the
page. Is it possible, as you scroll to identify when the "here" object
comes into view? Let's say I know that the object is a <div> that
takes up 100% of the page.

Thanks!

 

[Thomas 'PointedEars' Lahn]

Is this possible?

Is what possible? (Don't assume that people read the Subject header first.)

Say the above is a webpage, and I'm halfway through scrolling the
page. Is it possible, as you scroll to identify when the "here" object
comes into view?

It is, to a certain extent. You can determine the offset position of an
element by recursively adding up the values of the proprietary `offsetLeft'
and `offsetTop' properties of the corresponding DOM object each. You can
determine the scrolling position by evaluating the proprietary `scrollLeft'
and `scrollTop' properties of the HTMLHtmlElement (document.documentElement)
or the HTMLBodyElement (document.body) object. You can listen to scroll
events, keyboard events and mouse events to execute code when the document
was scrolled.


HTH

PointedEars