Question

What’s the cleanest way, like 1 line of JavaScript code, to set one text box’s text property to equal another?

e.g. the JavaScript way to accomplish this:

txtShipCity.Text = txtCity.Text;

Thanks!

Answer 1

In JavaScript:

document.getElementById('txtShipCity').value = document.getElementById('txtCity').value;

Sweeten it with jQuery:

$('#txtShipCity').val($('#txtCity').val());

Although you will probably have to use the ClientIDs of the two textboxes, so your JS might end up looking pretty nasty, like:

document.getElementById('<%= txtShipCity.ClientID %>').value = document.getElementById('<%= txtCity.ClientID %>').value;