function _CF_onError(form_object, input_object, object_value, error_message){
	alert(error_message);
		return false;	
}
function _CF_hasValue(obj, obj_type)
	{
	if (obj_type == "TEXT" || obj_type == "PASSWORD")
	{
		if (obj.value.length == 0) 
			return false;
		else 
			return true;
		}
	else if (obj_type == "SELECT")
	{
		for (i=0; i < obj.length; i++)
			{
		if (obj.options[i].selected)
			return true;
		}
		return false;	
	}
	else if (obj_type == "SINGLE_VALUE_RADIO" || obj_type == "SINGLE_VALUE_CHECKBOX")
	{
		if (obj.checked)
			return true;
		else
			return false;	
	}
	else if (obj_type == "RADIO" || obj_type == "CHECKBOX")
	{
		for (i=0; i < obj.length; i++)
			{
		if (obj[i].checked)
			return true;
		}
		return false;	
	}
	}
function  _CF_checklogin(_CF_this)
	{
	if  (!_CF_hasValue(_CF_this.login, "TEXT" )) 
		{
		if  (!_CF_onError(_CF_this, _CF_this.login, _CF_this.login.value, "Brukernavn må oppgis!"))
			{
			return false; 
			}
		}
	return true;
	}