function print_pop(url) 
{
	width   = 800;
	height  = 600;
	winLeft = (screen.width-width)/2;
	winTop  = (screen.height-height)/2;
	
	window.open(url, 'pop_print', 'left=' + winLeft + ',top=' + winTop + ',toolbar=0,scrollbars=1,location=0,status=0,menubar=0,resizable=yes,width='+width+',height='+height);
}