How to Determine the Highest Z-Index in a Document?

Determining the Highest Z-Index in a Document

To resolve an issue where a transparent text image needed to be displayed at the highest layer in a document, a z-index of 10,000 was initially chosen, solving the problem. However, a more scientific approach for determining the highest z-index is desired.

Firebug's inspection tools lack the ability to display this information. To overcome this limitation, an elegant solution utilizes JavaScript:

var maxZ = Math.max.apply(null,
    $.map($('body *'), function(e, n) {
      if ($(e).css('position') != 'static')
        return parseInt($(e).css('z-index')) || 1;
    }));

This code iterates through all elements in the document and compares their z-index values. The result is the highest z-index that can be used to make the transparent text image the most prominent element in the document.

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