function getObjectById(objectId) {
  if (document.getElementById && document.getElementById(objectId)) {
    return document.getElementById(objectId);
  } else if (document.all && document.all(objectId)) {
    return document.all(objectId);
  } else {
    return false;
  }
}

function checkForm() {
	var formObjs = document.forms[0].elements;
	for(var i=0; i < formObjs.length; i++) {
		if(formObjs[i].type.toLowerCase() == "hidden" && formObjs[i].name != "account") {
			var name = formObjs[i].name;
			formObjs[i].value=getFormValue(name);
		}
	}
}

function getFormValue(name) {
	var value = parseInt(name.substring(1));
	return 2*(value-5) + 5;
}