jquery textbox attribute selector

I'm using jquery.
I have 3 textboxes on my page.
They are named. textbox1, textbox2, textbox3

Right now I have this  run on page load:

// disable first dom element whose id starts with textbox
$('[id^=textbox]')[0].disabled = true;

But since I used [0]. That only disables the first textbox.

How do i revise the above line to disable all elements whose id starts with textbox ?
So it should disable all 3 textboxes.

Or if it would be easier by Class.