I have a webpage where there are two buttons and a textbox. When the page loads and user presses enter, the first button is clicked - and that is ok.

I would like to assure that if user enters the textBox and types anything there and THEN presses enter, the second button is clicked. When I enter the textBox I can tell that the first button will be used when I press enter, because it is a bit dark-blue-bordered then.

I tried javascript's

if (event && event.keyCode == 13)
    document.getElementById("Button2").click();

but it somehow doesn't work. So my second thought was that there must be a possibility to tell the browser which button should defaultly react for an enter press when I'm in a specific textBox (the dark-blue-bordered button).

Edit: it might matter that first button is input and the second one is asp:Button