var timeout;
function hvHide() {
	var showThis = 'hv_home';
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis;
	document.getElementById(showThis).style.display = "none";
	document.getElementById(showThis).style.visibility = "visible";	

	var showThis = 'hv_community';
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis;
	document.getElementById(showThis).style.display = "none";
	document.getElementById(showThis).style.visibility = "visible";

	var showThis = 'hv_media';
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis;
	document.getElementById(showThis).style.display = "none";
	document.getElementById(showThis).style.visibility = "visible";

	var showThis = 'hv_cup';
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis;
	document.getElementById(showThis).style.display = "none";
	document.getElementById(showThis).style.visibility = "visible";

	var showThis = 'hv_tv';
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis;
	document.getElementById(showThis).style.display = "none";
	document.getElementById(showThis).style.visibility = "visible";
}

function hvShow(showThis) {
	/*setTimeout(anzeige(showThis), 5000);*/
	hvHide();
	document.getElementById(showThis + '_img').className = 'tabicons img-' + showThis + '_h';
	document.getElementById(showThis).style.display = "block";
	document.getElementById(showThis).style.visibility = "visible";
}

function hvHover() {
	window.clearTimeout(timeout);
}

function hvClose() {
	timeout = window.setTimeout('hvShow(document.currentMenu)',2000);
}

function toggleLayer(whichLayer, tgl) {
    var elem, vis;
    if (document.getElementById) // this is the way the standards work
        elem = document.getElementById(whichLayer);
    else if (document.all) // this is the way old msie versions work
        elem = document.all[whichLayer];
    else if (document.layers) // this is the way nn4 works
        elem = document.layers[whichLayer];
    vis = elem.style;
    // if the style.display value is blank we try to figure it out here
    if (vis.display == '' && elem.offsetWidth != undefined && elem.offsetHeight != undefined)
        vis.display = (elem.offsetWidth != 0 && elem.offsetHeight != 0) ? 'block' : 'none';
    vis.display = (tgl == '0') ? 'none' : 'block';
    //vis.display = (vis.display == '' || vis.display == 'block') ? 'none' : 'block';
}