如何用js获取表单中的值

  </form> 

function login() {
//var account = document.account.value;
//var loginName = document.password.value;
///var loginName = document.code.value;
var account = document.getElementById("account").value;
var password = document.getElementById("password").value;
//验证用户名是否为空
if(account==""){
alert("用户名不能为空！");
return false;
}
//验证密码是否为空
if(password ==""){
alert("密码不能为空！");
return false;
}
document.getElementById("form1").submit();
}