var currentdiv = 'korbeld';

function BrowserCheck() {
	var b = navigator.appName;
	if (b=="Netscape") this.b = "ns";
	else if (b=="Microsoft Internet Explorer") this.b = "ie";
	this.v = parseInt(navigator.appVersion);
	
	this.ns4 = (this.b=="ns" && this.v<=4);
	this.ie4 = (navigator.userAgent.indexOf('MSIE 4')>0);
	this.ie5 = (navigator.userAgent.indexOf('MSIE 5')>0);
	this.ie6 = (navigator.userAgent.indexOf('MSIE 6')>0);
	this.moz = (this.b=="ns" && this.v>=5);
}
is = new BrowserCheck();

function show(div_id) {
	if(currentdiv != div_id)
	{
		hide(currentdiv);
	}
	currentdiv = div_id;
	if(is.ie4) {
		if(document.all[div_id]) {
			document.all[div_id].style.visibility = "visible";
		}
	} else {
		if(document.getElementById(div_id)) {
			document.getElementById(div_id).style.visibility = "visible";
		}
	}
	
}

function hide(div_id) {
	if (is.ie4) {
		if(document.all[div_id]) {
			document.all[div_id].style.visibility = "hidden";
		}
	} else {
		if(document.getElementById(div_id)) {
			document.getElementById(div_id).style.visibility = "hidden";
		}
	}
	currentdiv=null;
}

//document.oncontextmenu = function($e)
//{
//    if (window.event)
//    {
//        window.event.returnValue = false;
//    }
//    else
//    {
//        $e.preventDefault();
//    }
//};