function tabnav(t){
	document.getElementById('definities').style.display="none";
	document.getElementById('TopSEOreactions').style.display="none";

	document.getElementById('ldefinities').style.background="none";
	document.getElementById('lblog').style.background="none";

	if (t == 'definities'){
	    document.getElementById('definities').style.display="";
	    document.getElementById('ldefinities').style.background="#fff";
	}
	if (t == 'TopSEOreactions'){
	    document.getElementById('TopSEOreactions').style.display="";
	    document.getElementById('lblog').style.background="#fff";
	}
}