Bookmarklet.js

function engShow(){
    var tt = document.getElementsByTagName("blockquote");
    for (var i=0; i<tt.length; i++){
        tt[i].style.display="";
    }
};

function engHidden(){
    var tt = document.getElementsByTagName("blockquote");
    for (var i=0; i<tt.length; i++){
        tt[i].style.display="none";
    }
};

function makeButton(){
    

};

var body = document.getElementsByTagName("body")[0];
var btnHidden = document.createElement("span");
btnHidden.innerText = "[ Hidden English ] ";
btnHidden.onclick = engHidden;
btnHidden.style.position = "fixed";
btnHidden.style.left = "120px";
btnHidden.style.top = "50px";
body.insertAdjacentElement('afterbegin', btnHidden);

var btnShow = document.createElement("span");
btnShow.innerText = "[ Show English ] ";
btnShow.onclick = engShow;
btnShow.style.position = "fixed";
btnShow.style.left = "120px";
btnShow.style.top = "80px";
body.insertAdjacentElement('afterbegin', btnShow);


//result:javascript:function engShow(){var tt=document.getElementsByTagName("blockquote");for(var i=0;i<tt.length;i++){tt[i].style.display=""}};function engHidden(){var tt=document.getElementsByTagName("blockquote");for(var i=0;i<tt.length;i++){tt[i].style.display="none"}};var body=document.getElementsByTagName("body")[0];var btnHidden=document.createElement("span");btnHidden.innerText="[ Hidden English ] ";btnHidden.onclick=engHidden;body.insertAdjacentElement('afterbegin',btnHidden);var btnShow=document.createElement("span");btnShow.innerText="[ Show English ] ";btnShow.onclick=engShow;body.insertAdjacentElement('afterbegin',btnShow);