function sbmtchk() {
	if (document.areasrch.t1.value == "" || document.areasrch.t2.value == "" || document.areasrch.t3.value == "" || document.areasrch.c.value == "") {
		return(false);
	}
	var X = 520; var Y = 500;
	var posX = (screen.availWidth - X) / 2;
	var posY = (screen.availHeight - Y) / 2;
	var opt  = 'toolbar=no,location=no,status=no,menubar=no,dependent=yes,hotkeys=no,scrollbars=yes,directories=no,resizable=yes,width=' + X + ',height=' + Y + ',left=' + posX + ',top=' + posY;
	var wh   = window.open('','cmzareasrchwin',opt);
	wh.focus();
	document.areasrch.submit();
}