var OpenedWin;
function openWindow(URL,w,h,atEnd)
{
	if(!/\?/.test(URL))
	{
		URL = URL+'?';
	}

	if(!atEnd) { atEnd = ''; }

	OpenedWin = window.open(URL+atEnd+'', 'window'+w+h+'', 'width='+w+',height='+h+',top='+(screen.height-h)/2+',left='+(screen.width-w)/2+',screenX='+(screen.width-w)/2+',screenY='+(screen.height-h)/2+',location=0,directories=0,status=no,menuBar=no,scrollBars=yes,resizable=1');
	OpenedWin.focus();
}
function hideByID(element)
{
	document.getElementById(element).style.display = 'none';
}
function showByID(element)
{
	document.getElementById(element).style.display = '';
}