Changing maxlength in JScript

BrianWren · June 16th, 2006, 04:27 PM

I have

Code:

    . . .

    if (document.all["ALT_NUM"].size == 6)
    {
        document.all["ALT_NUM"].size      = 9;
        document.all["ALT_NUM"].maxlength = 8;
    }
    else
    {
        document.all["ALT_NUM"].size      = 6;
        document.all["ALT_NUM"].maxlength = 5;
    }

    . . .

</script>
<body>
    . . .

    <input type="text" name="ALT_NUM"
           size="6"    maxlength="5">
    . . .

(Obviously I'm showing fragments . . .)
When the code runs, I get the toggling of the size, but the input limit remains at 5 characters.

So. The question:

How can the maxlength of a text input be changed through JScript?

I had equally fruitless results with

Code:

   document.all["ALT_NUM"].style.maxlength = 5;

interrupt · June 17th, 2006, 07:36 AM

Hi Brian,

This should do it:

document.getElementById("Whatever").setAttribute(' maxlength', 5)

Cheers
Joe

BrianWren · June 20th, 2006, 03:11 PM

Sorry Joe, I'm afraid that didnât do the trick either.
What did wind up working though is the following:

Code:

  function Func_3()
  {
      var Value = document.all["ALT_NUM"].value;
      if (document.all["ALT_NUM"].size == 6)
      {
          document.all["ALT_NUM"].outerHTML = "<input name      = \"ALT_NUM\"        " 
                                            + "       size      = \"9\"              " 
                                            + "       maxlength = \"8\"              " 
                                            + "       value     = \"" + Value + "\" >";
      }
      else
      {
          document.all["ALT_NUM"].outerHTML = "<input name      = \"ALT_NUM\"        " 
                                            + "       size      = \"6\"              " 
                                            + "       maxlength = \"5\"              " 
                                            + "       value     = \"" + Value + "\" >";
      }
  }