add text to an asp.net textbox control with jQuery

Answer 1

Those are not ASP.NET TextBox controls; they're HTML text inputs. To answer your question though, you would do this:

I noticed that you're setting the name instead of the ID in your example. I would use ID if you have a choice, but you can find an element by name like this:

$("input[name='Field1']").val("Hello world");

If you use an actual ASP.NET TextBox control, the solution will be a little different:

If you want to get all of the text inputs in the search1 div, you can do this:

$(".forminput input[type='text']").val("Hello world!");

Here's a jsFiddle for the above example: http://jsfiddle.net/DWYTR/

EDIT

Per your comment, here is how you can copy a value from one input to another on blur:

$(".forminput input[type='text']").blur(function(){
    var txt = $("#<%=TextBox1.ClientID%>");
    if (txt){
        txt.val(txt.val() + $(this).val());
    }
});