Stuff

				var chkSubscribed = "CP2";
				GM_log("CP1");
				GM_log(chkSubscribed);
				//Check if already subscribed to thread
				chkSubscribed = document.evaluate( "//td[@class='s1']/.." ,document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue.textContent.match('SUBSCRIBED');
				GM_log("CP3");
				GM_log(chkSubscribed);

				//If subscribed, mark post as read
				if (chkSubscribed == "SUBSCRIBED") {
					markReadBox = document.getElementById("modesu");

					markReadBox.click();
				}

				prevbutton = document.getElementById("post");

				prevbutton.click();