function openwindow(windowname,url,width,height,top,left) {
	//window properties
	frmWindow = window.open(url+'&now='+Date(),windowname,'location=no,status=yes,toolbar=no,resizable=yes,scrollbars=yes,width='+width+',height='+height+',top='+top+',left='+left);
	frmWindow.focus();
}