transparency - How to change opacity of a Xul element at runtime? -


i've tried 

document.getelementbyid("myid").style = "opacity: 0.5";

but didn't work:

error: setting property has getter

also looks there's no "opacity" attribute or parameter (in box or window element).

any idea?

try setting style attribute

document.getelementbyid("myid").setattribute("style", "opacity: 0.5");

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