how can i transfer the Value from Input 1 in 2 and add some letters?

<script type="text/javascript">

function doit(){
document.getElementById('input2').value=document.getElementById('input1').value;
}

</script>

Input1: 2342

Input2: pcid2342d

Can some one help me?

how can i transfer the Value from Input 1 in 2 and add some letters?

<script type="text/javascript">

function doit(){
document.getElementById('input2').value=document.getElementById('input1').value;
}

</script>

Input1: 2342

Input2: pcid2342d

Can some one help me?

• javascript
• html
• input
• string-concatenation

• Your attempt looks good. Does it not work? – Gumbo Commented Jul 1, 2010 at 13:20
• The code appears to be mostly correct. What errors are you getting? What is not working? – Oded Commented Jul 1, 2010 at 13:21
• there are no errors, it was that i don't know how to add letters on the string :-) – Sebastian Commented Jul 1, 2010 at 13:32

4 Answers 4

Just use the + operator to add a string before and after the input value.

<script type="text/javascript">

function doit(){
document.getElementById('input2').value="pcid" + document.getElementById('input1').value + "d";
}

</script>

String concatenation:

document.getElementById('input2').value = "stuff" + document.getElementById('input1').value + "other stuff";

When dealing with numbers you could start by concatenating with empty string to avoid adding numbers together instead of concatenating to strings (because of operator evaluation order):

document.getElementById('input2').value = "" + 1234 + 567 + document.getElementById('input1').value + 89;

Well you seem to have done the work already, all you need is something to click on to execute it:

<button onclick="doit()">click me</button>

Why don't you try something in jQuery?

  $("#Anything").click(function() {
     $("#Field1").val($("#Field2").val());
  });

The "click" is just a assumption =)