function call_calc(dmn) {
	if(!(dmn.match(/^([a-zA-Z0-9\-]+\.)+[a-zA-Z0-9\-]+$/))) {
		alert(dmn+' - Domain name is not valid');
		return false;
	}
	window.open('appraisal.php?dmn='+dmn, '',  'width=650,height=650,resizable=1,scrollbars=1');
}