function showS2010() {
            document.getElementById('stromW2010').style.display = "block";
            document.getElementById('stromW2009').style.display = "none";
            document.getElementById('stromW2008').style.display = "none";
            document.getElementById('stromW2007').style.display = "none";
        }
        function showS2009() {
            document.getElementById('stromW2010').style.display = "none";
            document.getElementById('stromW2009').style.display = "block";
            document.getElementById('stromW2008').style.display = "none";
            document.getElementById('stromW2007').style.display = "none";
        }
        function showS2008() {
            document.getElementById('stromW2010').style.display = "none";
            document.getElementById('stromW2009').style.display = "none";
            document.getElementById('stromW2008').style.display = "block";
            document.getElementById('stromW2007').style.display = "none";
        }
        function showS2007() {
            document.getElementById('stromW2010').style.display = "none";
            document.getElementById('stromW2009').style.display = "none";
            document.getElementById('stromW2008').style.display = "none";
            document.getElementById('stromW2007').style.display = "block";
        }

        function showSB2010() {
            document.getElementById('stromB2010').style.display = "block";
            document.getElementById('stromB2009').style.display = "none";
            document.getElementById('stromB2008').style.display = "none";
            document.getElementById('stromB2007').style.display = "none";
        }
        function showSB2009() {
            document.getElementById('stromB2010').style.display = "none";
            document.getElementById('stromB2009').style.display = "block";
            document.getElementById('stromB2008').style.display = "none";
            document.getElementById('stromB2007').style.display = "none";
        }
        function showSB2008() {
            document.getElementById('stromB2010').style.display = "none";
            document.getElementById('stromB2009').style.display = "none";
            document.getElementById('stromB2008').style.display = "block";
            document.getElementById('stromB2007').style.display = "none";
        }
        function showSB2007() {
            document.getElementById('stromB2010').style.display = "none";
            document.getElementById('stromB2009').style.display = "none";
            document.getElementById('stromB2008').style.display = "none";
            document.getElementById('stromB2007').style.display = "block";
        }

        function showG2010() {
            document.getElementById('gas2010').style.display = "block";
            document.getElementById('gas2009').style.display = "none";
            document.getElementById('gas2008').style.display = "none";
            document.getElementById('gas2007').style.display = "none";
        }
        function showG2009() {
            document.getElementById('gas2010').style.display = "none";
            document.getElementById('gas2009').style.display = "block";
            document.getElementById('gas2008').style.display = "none";
            document.getElementById('gas2007').style.display = "none";
        }
        function showG2008() {
            document.getElementById('gas2010').style.display = "none";
            document.getElementById('gas2009').style.display = "none";
            document.getElementById('gas2008').style.display = "block";
            document.getElementById('gas2007').style.display = "none";
        }
        function showG2007() {
            document.getElementById('gas2010').style.display = "none";
            document.getElementById('gas2009').style.display = "none";
            document.getElementById('gas2008').style.display = "none";
            document.getElementById('gas2007').style.display = "block";
        }