@section('content')
            <div class="span12">
                <div class="widget">
                    <div class="widget-content" id="game-content">
                        <div class="resource-left">
                            @foreach ($items as $key => $item)
                                @if( $item->id == $item->builded )
                                    <!-- Here I give $kexy to onClick and JS, this is working -->
                                    <a data-key="{{$key}}" href="#" onclick="buildingtable(this.getAttribute('data-key'));">
                                        <div id="first-resource-left">
                                            {{ $item->title }} Gebaut
                                        </div>
                                    </a>
                                @else
                                    <a href="#" onclick="buildingview();">
                                        <div id="first-resource-left">
                                            {{ $item->title }} Frei
                                        </div>
                                    </a>
                                @endif
                            @endforeach
                        </div>
                    </div>
                </div>
            </div><!-- Hero unit -->

            <div class="building-table" id="building-table" style="visibility: hidden;">
                <div class="span12">
                    <div class="widget">
                        <div class="widget-content" id="game-content">
                            <a href="#" onclick="closetable();" style="float:right; margin-right: 50px;"><span class="icon-close"></span></a><br/>
                            <div class="content">
                                <div id="building-image"></div>
                                <div id="building-table-content">
                                    <!-- Need to have given $key value here -->
                                    <h3><span id="key-ausgabe"></span>{{ $items[$key]['title'] }}</h3>
                                    <p>{{ $item->text }}</p>
                                </div>
                             </div>
                        </div>
                    </div>
                </div><!-- Hero unit -->
            </div>  

// JS:

function buildingtable(data_key){
    document.getElementById("building-table").style.visibility = "visible";
    var key = data_key;
    alert("data-key:"+data_key);
    alert(key);
    document.getElementById("key-ausgabe").innerHTML = key;
}