JavaScript hacks

/*--------------------------------------*/
var loadjQuery = function(cb){
    var scr = document.createElement('script');
    scr.setAttribute('type', 'text/javascript');
    scr.setAttribute('src', 'https://code.jquery.com/jquery-3.3.1.min.js');
    if(scr.readyState){
       scr.onreadystatechange = function(){
           if(scr.readyState === 'complete' || scr.readyState === 'loaded'){
              scr.onreadystatechange = null;
              if(cb === 'function'){
                 args = [].slice.call(arguments, 1);
                 cb.apply(this, args);
              }
           }
       };
    } else {
        scr.onload = function(){
           if(typeof(cb) === 'function'){
              args = [].slice.call(arguments, 1);
              cb.apply(this, args);
           }
        };
    }

    var head = document.getElementsByTagName('head')[0];
    head.insertBefore(scr, head.firstChild);
}

loadjQuery(function() {
    $('body').empty();
    let getRandomInt = function (max) {
        return Math.floor(Math.random() * Math.floor(max));
    };
    let curr=getRandomInt(5000);
    let addNewAvatar=function() {
        $('body').append(
            $('<img />').attr(
                'src', 'https://avatars.githubusercontent.com/u/'+curr
            ).css({
                'max-width': '50px',
                'display': 'inline-block',
                'float': 'left',
                'margin': '0',
                'padding': '0'
            })
        );
        curr += (1+getRandomInt(3));
        setTimeout(addNewAvatar, 100);
    };
    setTimeout(addNewAvatar, 100);
});

/*--------------------------------------*/
var loadjQuery = function(cb){
    var scr = document.createElement('script');
    scr.setAttribute('type', 'text/javascript');
    scr.setAttribute('src', 'https://code.jquery.com/jquery-3.3.1.min.js');
    if(scr.readyState){
       scr.onreadystatechange = function(){
           if(scr.readyState === 'complete' || scr.readyState === 'loaded'){
              scr.onreadystatechange = null;
              if(cb === 'function'){
                 args = [].slice.call(arguments, 1);
                 cb.apply(this, args);
              }
           }
       };
    } else {
        scr.onload = function(){
           if(typeof(cb) === 'function'){
              args = [].slice.call(arguments, 1);
              cb.apply(this, args);
           }
        };
    }
    var head = document.getElementsByTagName('head')[0];
    head.insertBefore(scr, head.firstChild);
}

loadjQuery(function() {
    $('body').empty();
    $.ajax({
        type: 'get',
        url: 'https://api.magicthegathering.io/v1/cards?page=311'
    }).done(function(data) {
        for (var i=0; i<data.cards.length; i++) {
            $('body').append(
                $('<img />').attr('src', data.cards[i].imageUrl)
            );
        }
    });
});