===== CHATFILTERS =====
!!(\/\/(i.imgur.com)\/(\w+)\.(\w+))
<a href="$1" target="_blank"><img src="http://$2/$3t.$4" class="chat-img"></a>

========= CSS =========
div.upload {
    width:558px;
    height:100px;
    background:url(http://i.imgur.com/t5vj728.png);
    overflow:hidden;
}

div.upload input {
    display:block!important;
    width:558px!important;
    height:100px!important;
    opacity:0!important;
    overflow:hidden!important;
    cursor:pointer
}

#imgupload > .modal-dialog > .modal-content {
    width: 600px;
    margin: 0px auto;
}

========= JS ==========
var imgurUpload = function() {
if ($("#uploadbtn").length == 0)
    $("#leftcontrols").append('<button id="uploadbtn" class="btn btn-sm btn-default" data-toggle="modal" data-target="#imgupload">Загрузить картинку</button>');
if ($("#imgupload").length == 0)
    $("body").append('<div class="modal fade" id="imgupload" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"><div class="modal-dialog"><div class="modal-content"><div class="modal-header"><button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button><h4 class="modal-title" id="myModalLabel">Загрузить картинку</h4></div><div class="modal-body"><div class="upload"><input type="file" id="image_selector" /></div><img src="" id="image_preview" /></div></div></div></div>');
var clearFields = function() {
    $("#image_selector").val('');
    $("#image_preview").attr('src', '');
    $("#imgupload").css({'cursor': 'auto'});
};
$("#image_selector").on("change", function() {
    var reader = new FileReader();
    reader.onload = function(e) {
        var data = e.target.result.substr(e.target.result.indexOf(",") + 1, e.target.result.length);
        $("#image_preview").attr("src", e.target.result);
        $.ajax({
            url: 'https://api.imgur.com/3/image',
            headers: {
                'Authorization': 'Client-ID YOUR-CLIENt-ID-HERE'
            },
            type: 'POST',
            data: {
                'image': data,
                'type': 'base64'
            },
            beforeSend: function() {
                $("#imgupload").css({'cursor': 'wait'});
            },
            success: function(response) {
                $("#imgupload").modal('hide');
                clearFields();
                $("#chatline").val($("#chatline").val() + '!!' + response.data.link.substring(5)).focus();
            }, error: function() {
                alert("Что-то пошло не так.");
                clearFields();
            }
        });
    };
    reader.readAsDataURL(this.files[0]);
});
}
if ($("#uploadbtn").length == 0)
imgurUpload();