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What is the logic of Lightbox 2 on where to position the popup?

It seems that when using Firefox or Chrome it shows up in different places on different pages. Is there any setting to have it show at the same height on every page for consistency?

What is the CSS or logic it's using to determine positioning?

What is the logic of Lightbox 2 on where to position the popup?

It seems that when using Firefox or Chrome it shows up in different places on different pages. Is there any setting to have it show at the same height on every page for consistency?

What is the CSS or logic it's using to determine positioning?

• javascript
• css
• prototypejs
• lightbox2

Share Follow edited Dec 29, 2011 at 14:36 Rob W 349k8787 gold badges807807 silver badges682682 bronze badges asked Oct 15, 2009 at 3:00 leoraleora 197k368368 gold badges906906 silver badges1.4k1.4k bronze badges 3

• What lightbox 2, what framework (if any...)? I'm using one under jQuery - called lightbox 2 - and it is always centered (except on the iPhone). – jeroen Commented Oct 15, 2009 at 3:13
• huddletogether./projects/lightbox2 – leora Commented Oct 15, 2009 at 3:30
• 1 Have you considered "position: fixed; top: 100px;"? The fixed position generates an absolutely positioned element, positioned relative to the browser window. The element's position is specified with the "left", "top", "right", and "bottom" properties ... w3schools./Css/pr_class_position.asp – gahooa Commented Nov 27, 2009 at 15:05

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5 Answers 5

Sorted by: Reset to default 11 +275

In what way does it display on different places, what is your desired behaviour, and can you give a sample page?

Here is how the script itself calculates the top position of the popup (lightbox v2.04, zip download, js/lightbox.js, lines 229ff):

// calculate top and left offset for the lightbox 
var arrayPageScroll = document.viewport.getScrollOffsets();
var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
var lightboxLeft = arrayPageScroll[0];
this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();

As the script uses Prototype's document.viewport object, the script positions the popups at 10% inside the current scroll position, like this:

------- page start
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------- scroll position top
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------- start of lightbox popup
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------ scroll position bottom
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------ page end

I know this is a very old thread, but still top 5 google results. IE/FF gives me good results but Chrome doesn't. To get them all consistent,

line 231 of js/lightbox.js

var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);

was changed to

var lightboxTop = arrayPageScroll[1] + (100);

Not exactly what was requested, but the pages are consistent now.

Info taken from http://www.lokeshdhakar./forums/discussion/5494/fixed-display-position-problems-with-firefox-but-not-ie-on-tall-webpages/p1

In line 231 at lightbox.js adjust division by 10 to 100 like this:

document.viewport.getHeight() / 100

Sample code:

    // calculate top and left offset for the lightbox 
    var arrayPageScroll = document.viewport.getScrollOffsets();
    var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 100); // 
    var lightboxLeft = arrayPageScroll[0];
    this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();

You could try Flowplayer:

http://flowplayer/tools/demos/index.html

You can set the positioning and size of your overlay through the CSS file to wherever you want.

#lightbox{
position: absolute;
top: 100px !important; /*I foxed it 100px from the top, you could fix it as much pixels as you wish*/
} 

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