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Machine Flower Next Link in Image

Makes the image a link to the next comic, and arrow keys control movement.

// ==UserScript==
// @name        Machine Flower Next Link in Image
// @namespace   http://userscripts.org/users/Scuzzball
// @include     http://www.machineflower.com/*
// @version     2.0
// @description Makes the image a link to the next comic, and arrow keys control movement.
// @grant       none
// ==/UserScript==


var nextPatt = /next/
if(nextPatt.test(document.getElementById('menunav').childNodes[2].innerHTML))
{
	var navNext = document.getElementById('menunav').childNodes[2];
}
else
{
	var navNext = ""
}


document.getElementById('comic').innerHTML = '<a href="' + navNext + '">' + document.getElementById('comic').innerHTML + '</a>';

function leftArrowPressed() {
	window.location = document.getElementById('menunav').childNodes[1];
}

function rightArrowPressed() {
	window.location = navNext;
}

document.onkeydown = function(evt) {
    evt = evt || window.event;
    switch (evt.keyCode) {
        case 37:
            leftArrowPressed();
            break;
        case 39:
            rightArrowPressed();
            break;
    }
};