var lastSelected = 0;
var lsObj = "";
var obj = "";
function changeStyle(tobj, change, titel) {
    obj = document.getElementById(tobj);
    
    if (lsObj == "") {
        lsObj = "tab1";
        lastChange = document.getElementById('NieuwsTab');

    }
    lastSelected = document.getElementById(lsObj);
    
    if (lastSelected != tobj) {
    
        obj.style.background = "#url(\"/gfx/btn/vvv-btn-hover.gif\") no-repeat left bottom";
        document.getElementById('HeaderTabLeft').innerHTML = titel;
        lastSelected.style.background = "#url(\"/gfx/btn/vvv-btn-hover.gif\") no-repeat left bottom";
        lastChange.style.display = "none";
        lastChange = document.getElementById(change);
        lastChange.style.display = "block";
        lsObj = tobj;
    }

}