exblog.user.js

// ==UserScript==
// @name exBlogLoad
// @description Download image from exblog.jp
// @author Tsumugi Kotobuki
// @license MIT
// @version 0.01
// @include http://*.exblog.jp/*
// ==/UserScript==
 
(function (window, undefined) { 
    var w;
    if (typeof unsafeWindow != undefined) {
        w = unsafeWindow
    } else {
        w = window;
    }


window.downloadFile = function(sUrl) {

    //If in Chrome or Safari - download via virtual link click
    if (window.downloadFile.isChrome || window.downloadFile.isSafari) {
        //Creating new link node.
        var link = document.createElement('a');
        link.href = sUrl;

        if (link.download !== undefined){
            //Set HTML5 download attribute. This will prevent file from opening if supported.
            var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
            link.download = fileName;
        }

        //Dispatching click event.
        if (document.createEvent) {
            var e = document.createEvent('MouseEvents');
            e.initEvent('click' ,true ,true);
            link.dispatchEvent(e);
            return true;
        }
    }

    // Force file download (whether supported by server).
    var query = '?download';

    window.open(sUrl + query);
}

window.downloadFile.isChrome = navigator.userAgent.toLowerCase().indexOf('chrome')>-1;
window.downloadFile.isSafari = navigator.userAgent.toLowerCase().indexOf('safari')>-1;

addButton = function() {
  myButton = document.createElement("input");
  myButton.type = "button";
  myButton.value = "Download";
  myButton.onclick = function() { 
	var objects = document.getElementsByClassName("IMAGE_MID");
	for (i=0;i<objects.length;i++)
		downloadFile(objects[i].src)
  }
  placeHolder = document.getElementsByClassName("posttail")[0];
  placeHolder.appendChild(myButton);
}

    if (w.self != w.top) {
        return;
    }
 
    addButton();
})(window);