function check_register(form) {
    var test = true;
    var alerttext = "Please complete the following fields:\r\r";    

    if(form.nickname.value == "") {
	alerttext = alerttext + "Nick name\r";
	test = false;
    }
    if (form.nickname.value.length < 2 && form.nickname.value != "") {
	alerttext = alerttext + "Nick name length min. is 2\r";
	test = false;
    }
    if(form.fullname.value == "") {
	alerttext = alerttext + "Full name\r";
	test = false;
    }
    if(form.email.value == "") {
	alerttext = alerttext + "E-mail\r";
	test = false;
    }
    
    if(form.pw.value == "") {
		alerttext = alerttext + "Password\r";
		test = false;
    }
    if(form.pw.value.length < 6 && form.pw.value != "") {
	alerttext = alerttext + "Password length must be at least 6\r";
	test = false;
    } 
    if (!test) alert(alerttext);

    return test;
}