Finding a variable's type

[GMoyle]

I've written some validation routines that take a form field as a parameter.

I want to adapt the routines so that they can take either form fields OR strings. I therefore need to be able to test for the parameter's type because if it's a field I'll use ParamName.value to get the value, where as if it's a String this will throw an error.

I've studied Java and think there's a method called .instanceOf which can be applied to objects, but what type is a Form Field and how is this method used?

Thanks!
Gareth.

 

[jemminger]

hi Gareth,

use "typeof":

function foo(sArgument) {
if (typeof sArgument == "string&quot
// do stuff...
else if (typeof sArgument == "object&quot
// do other stuff...
} ======================================

if (!succeed) try();
-jeff

 

[GMoyle]

Thanks Jeff - That seems to be working OK. Don't suppose you know the 'type' for a Form field do you?

Thanks

Gareth.

 

[jemminger]

i believe it should display as "object"

test it:

<input type=&quot;button&quot; value=&quot;show typeof&quot; onclick=&quot;alert(typeof this);&quot; />
======================================

if (!succeed) try();
-jeff