dojo.require("dojo.html.style");
dojo.provide("dojo.html.color");
dojo.require("dojo.gfx.color");
dojo.require("dojo.lang.common");
dojo.html.getBackgroundColor = function(/* HTMLElement */node){
// summary
// returns the background color of the passed node as a 32-bit color (RGBA)
node = dojo.byId(node);
var color;
do{
color = dojo.html.getStyle(node, "background-color");
// Safari doesn't say "transparent"
if(color.toLowerCase() == "rgba(0, 0, 0, 0)") { color = "transparent"; }
if(node == document.getElementsByTagName("body")[0]) { node = null; break; }
node = node.parentNode;
}while(node && dojo.lang.inArray(["transparent", ""], color));
if(color == "transparent"){
color = [255, 255, 255, 0];
}else{
color = dojo.gfx.color.extractRGB(color);
}
return color; // array
}