var l = "Listener";
var aL = "add" + l,
    hL = "has" + l,
    rL = "remove" + l,
    c = false,
    bA = chrome.browserAction,
    a = chrome.tabs;

function w(tab) {
    if (/^http\:\/\/konachan\.com\/post\/show\/\d+\/[\w-]+$/i.test(tab.url)) a.executeScript(tab.id, {
        code: "with(document)location=getElementById('image').getAttribute('src')"
    })
}

bA.onClicked[aL](function (tab) {
    c = !c;
    var b = a.onCreated;
    if (c != b[hL](w)) b[c ? aL : rL](w);
    bA.setIcon({
        path: "icon19" + (c ? "on.png" : "off.png")
    });
    bA.setTitle({
        title: "Konachan wallpapers\nviewing assistant.\n" + (c ? "Wokring" : "Turned off")
    })
})