var openedWindow; 
function openCenterWindow(url, name) 
{ 
	var w = screen.availWidth;
	var h = screen.availHeight;
	if(!openedWindow || openedWindow.closed)
	{
		openedWindow = window.open(url,name,'top=0,left=0,outerHeight='+h+',outerWidth='+w+",location=no,menubar=no,status=no,resizable=no,width="+w+",height="+h+",scrollbars=auto,copyhistory=0,directories=0");
	}
	else
	{
		openedWindow.focus();
	};

	void(0);
}