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Getting global and external
style sheet values in Firefox
In Firefox (and other browsers such as Opera, Safari, and Google
Chrome), getting the CSS property values of global/external style sheets
is done using a different method, "
Like IE's "
currentStyle" object, it returns an
object that contains the cascaded values of all CSS properties applied
to an element. To get the value to a specific cascaded CSS property,
you'd just look up that property within the returned object. Lets jump straight to an example, which is probably the quickest way to
illustrate how "
<div id="test">This is some text</div>
var inheritedstyle=document.defaultView.getComputedStyle(mydiv, "")
var divwidth=inheritedstyle.width //contains "100px"
var divbgcolor=inheritedstyle.backgroundColor //contains "yellow"
As you can see, "
operates in the exact same manner as IE's "
object, though you access this method from the document,
instead of as a property of a DOM element.
accepts two parameters- a reference to the desired element, plus a
string specifying the pseudo-element to match. For regular elements, you
should enter a blank string ("") for the later. Upon invoking this
method, the CSS
property to retrieve the cascaded value of should also be accessed
using the camelCase convention (ie: "
Before moving on, it's worth mentioning that Firefox supports
window.getComputedStyle, which behaves
similarly to "
that object isn't recognized by some browsers such as Safari, so it should
Ok, now that we have the techniques for getting the cascaded CSS property
values across browsers down, lets see how to merge the two into a single,
cross browser one.
Cross browser function for retrieving global/external CSS properties