function check_form(form_name) {
	var message = "";
	var error = 0;
	// var fieldArray = new Array("name_first","name_last","password","password2");
	var fieldArray = new Array();
	
	for (var i = 0; i < fieldArray.length; i++) {
		tmp = eval("document." + form_name + "." + fieldArray[i] + ".value");
		if (tmp == "") { error = error + 1; message += fieldArray[i] + "\n"; }
	}

	if (error != 0) {
		alert ("Please fill in all the required fields.\n" + message);
		return false;
	}
	
}