Danbooru Batch Downloader v2.3

// Allows selective batch download
// Just check the images you want to download and hit the [Download Selected] button
 
javascript: (function() { 
	if(window.jsdanbooruLoaded) { 
		alert("JS-Danbooru already loaded"); return; 
	}
 
var images = document.getElementsByClassName("thumb"),
    sidebar = document.getElementsByClassName("sidebar")[0],
    selection = [],
    postID = [],
    links_html = "",
    n = images.length;
 
function createButton(value) {
	var btn = document.createElement("input");	
	btn.type = "button";
	btn.value = value;
	return btn;
}
 
function download(mode) { return function() {
	n = images.length;
	links_html = "";
	for(var i = 0; i < n; i++) {
		if(mode === "all" || selection[i].checked) {
			var imgsrc = Post.posts.get(postID[i]).sample_url;
			links_html += "<a href=" + imgsrc + ">" + imgsrc + "</a><br />\n";
		}
	}
	var links = window.open();
	links.document.write(links_html); links.document.close();
}; }
 
for(var i = 0; i < n; i++) {
	selection[i] = document.createElement("input");
	selection[i].type = "checkbox";
	images[i].appendChild(selection[i]);
	postID[i] = parseInt(images[i].parentNode.id.substring(1), 10) || 
		    parseInt(images[i].id.substring(1), 10);
}
 
var download_selected = createButton("Download Selected");
download_selected.onclick = download("selected");
 
var download_all = createButton("Download All");
download_all.onclick = download("all");
 
var buttons = document.createElement("center");
buttons.appendChild(download_selected);
buttons.appendChild(download_all);
sidebar.appendChild(buttons); window.jsdanbooruLoaded = true; })();  // NULLTERM [\0]