function CheckForm(frm) {
	var errmsg = "";
	var nerr = 0;
	var req = "";
	var fname;

	if (frm.required) {
		req = frm.required.value;
	}
	
	for (var i=0; i<frm.length; i++) {
		if (frm.elements[i].value=="" && (frm.elements[i].type=="text" || frm.elements[i].type=="textarea")) {
			fname = frm.elements[i].name;
			if (req.indexOf(fname) != -1) {
				errmsg += "\n\t" + frm.elements[i].id;
				nerr++;
			}
		}
	}
	
	// Display an error message for any missing fields
	if (nerr > 0) {
		DisplayError(errmsg, nerr);
		return false;
	}
	return true;
}

function DisplayError(errmsg, nerr) {
	msg = "________________________________________________________________\n\n";
	msg += "This form has not been submitted because there is a problem with it.\n";
	msg += "Please correct the problem and re-submit the form.\n";
	msg += "_______________________________________________________________\n\n";

	if (nerr > 1) {
		msg += "The following fields are required:\n";
	} else {
		msg += "The following field is required:\n";
	}

	msg += errmsg + "\n\n";
	alert(msg);	
}