Fix a character to text input box using javascript/jquery

Question

I am looking for a way to \'fix\' a dollar symbol $ to a text input box eg but make it not possible for the default va

Answer 1

I did it like this:

$('#price').keypress(function(event) {
var code = (event.keyCode ? event.keyCode : event.which);
if ($(this).val().indexOf('$') === -1){
    document.getElementById("price").value = "$" + $(this).val();
  } else {
    document.getElementById("price").value = $(this).val();
  }  
});

with .

User can remove the dollar sign manually though if he/she wants to.