javascript - How to update the value in one text box based on the value entered in another text box?

Question

How do I update the value in one text box (txtInterest%) based on the value entered/changed in another text box (txtAmt)?

Answer 1

Use jQuery's change method for updating. Using your example:

$('#txtAmt').change(function() {
  //get txtAmt value  
  var txtAmtval = $('#txtAmt').val();
  //change txtInterest% value
  $('#txtInterest%').val(txtAmtval);
});