function add_new_artistimg(){
    var _count = $(".artist_image input[type=file]").length;
    if (_count < 6)
    {
        var html = '<div class="one_image">';
        html += '<label class="label_image" for="artist_image_'+(_count+1)+'">';
        html += '<p>写真 '+(_count+1)+'</p>';
        html += '<img id="artist_image_'+(_count+1)+'_img" src="https://marvelous-arc.com/wp-content/themes/s_customify/data/img/20160910_photo.svg">';
        html += '</label>';
        html += '<input type="file" id="artist_image_'+(_count+1)+'" class="artist_image_ele" name="artist_image[]" accept="image/x-png,image/gif,image/jpeg" value="" onchange="set_image_to(\'artist_image_'+(_count+1)+'\')">';
        html += '<input type="hidden" id="artist_image_'+(_count+1)+'_hidden" name="artist_image_upload[] value="">';
        html += '</div>';
                        
        $(".artist_image").append(html);
    }
    else
        alert("アーティスト写真を最大6まで2。");
}
                            
function set_image_to(artist_image){
    var fd = new FormData();
    if ($("#"+artist_image).val() !== '') {
        fd.append( "file", $("#"+artist_image).prop("files")[0] );
    }

    fd.append( "action","add_new_image");
    var postData = {
        url : ajaxurl,
        type : "POST",
        dataType : "text",
        data : fd,
        processData : false,
        contentType : false,
        success: function( response ){
            var default_img = "https://marvelous-arc.com/wp-content/themes/s_customify/data/img/20160910_photo.svg";
            if (response == "over_3MB_IMAGE"){
                $("#"+artist_image+"_hidden").val("");
                $("#"+artist_image+"_img").attr("src",default_img);
                alert("1ファイル3MB以下、合計で最大10MB以下のファイルサイズに収めてください。");
            }
            else{
                $("#"+artist_image+"_hidden").val(response);
                if (response == "")
                    $("#"+artist_image+"_img").attr("src",default_img);
                else
                    $("#"+artist_image+"_img").attr("src",response);
            }
        },
        error: function(response){
                console.log("error");
                console.log(response);
            }
    };
                              
    $.ajax(
        ajaxurl, postData
    ).done(function( text ){
        //console.log(text);
    });    
                                                    
}