function open_window(url,wiz,hei,scrol,resiz) {
	leff=(screen.width / 2)-(wiz/2);
	topp=(screen.height / 2)-(hei/2);
	sc="no";
	if(scrol) sc="yes";
	rz="no";
	if(resiz) rz="yes";
	return window.open(url,"","scrollbars="+sc+",resizable="+rz+",location=no,menubar=no,titlebar=no,status=no,toolbar=no,height="+hei+",width="+wiz+",left="+leff+
		",top="+topp+"");
}