Set the value of an input field

Question

How would you set the default value of a form text field in JavaScript?

Answer 1

This part you use in html

<input id="latitude" type="text" name="latitude"></p>

This is javaScript:

<script>
document.getElementById("latitude").value=25;
</script>

Answer 2

document.getElementById("fieldId").value = "Value";

or

document.forms['formId']['fieldId'].value = "Value";

or

document.getElementById("fieldId").setAttribute('value','Value');

Answer 3

<form>
  <input type="number"  id="inputid"  value="2000" />
</form>


<script>
var form_value = document.getElementById("inputid").value;
</script>    

You can also change the default value to a new value

<script>
document.getElementById("inputid").value = 4000;     
</script>