Question

When I submit a form in HTML, I can pass a parameter multiple times, e.g.

<input type='hidden' name='id' value='2'> <input type='hidden' name='id' value='4'> 

Then in struts I can have a bean with property String[] id, and it’ll populate the array correctly.

My question is, how can I do that in Javascript? When I have an array, and I set form.id.value = myArray, it just sets the value to a comma-separated list. So then on the Struts end, I just get one-element array, i.e. the String ‘2,4’.

I should add, I need to submit this in a form, so I can’t just generate a GET request, e.g. id=2&id=4.

Answer 1

Is this what you’re looking for? It generates a hidden form field for each element of a JavaScript array:

var el; for (var i = 0; i < myArray.length) {     el = document.createElement('input');     el.type = 'hidden';     el.name = 'id';     el.value = myArray[i];      // Optional: give each input an id so they can easily be accessed individually:     el.id = 'hidden-myArray-' + i;      // Optional: give all inputs a class so they can easily be accessed as a group:     el.className = 'hidden-myArray';      form.appendChild(el); }