Question

I have a generic JavaScript function which takes one parameter

function foo(val) { ...} 

and I want to call the function when submit a form

<form>
<input type="text" id="formValueId"/>
<input type="button" onclick="foo(this.formValueId)"/>
</form>

but the expression foo(this.formValueId) does not work (not surprised, it was a desperate attempt), So the question is, how can I pass a form value to the javascript function.
As I mentioned the javascript is generic and I don’t want to manipulate the form inside it!

I could create a helper function in the middle to get the form values with jQuery (for example) and then call the function but I was wondering if I can do it without the helper function.

Answer 1

It might be cleaner to take out your inline click handler and do it like this:

$(document).ready(function() {
    $('#button-id').click(function() {
      foo($('#formValueId').val());
    });
});