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How can I provide a mask for an INPUT field which is autocompleted while the user types?

Jan 25th, 2001 07:29
Martin Honnen,

IE4+ on those platforms where the range objects exists (Win32 at least) 
allows that; here is an example which provides a date
  YYYY-MM-DD
mask, which is selected when the user focusses on the field and then 
autocompleted and selected when the user types in text:
<HTML>
<HEAD>
</HEAD>
<BODY>
<FORM NAME="formName">
<INPUT TYPE="text" 
       NAME="date" 
       VALUE="YYYY-MM-DD"
       SIZE="10" STYLE="font-family: 'Courier New';"
       ONFOCUS="this.select(); 
                this.oldValue = this.value;"
       ONKEYUP="var n = this.value.length;
                this.value = this.value + this.oldValue.substring(n);
                var range = this.createTextRange();
                range.moveStart('character', n);
                range.select();
                this.oldValue = this.value;"
>
</FORM>
</BODY>
</HTML>