function openwindow(URL)
{
	params  = 'width='+screen.width;
	 params += ', height='+screen.height;
	 params += ', top=0, left=0'
	 params += ', fullscreen=yes';
	
	 newwin=window.open(URL,'windowname4', params);
	 if (window.focus) {newwin.focus()}
	 return false;
}