This option is only available for the "none", "integer", "email", and "url" validation types.
The minChars option does not enforce a minimum number of characters if the text field is not required.
To specify a minimum or maximum number of characters,
add the minChars property or maxChars property
(or both) and a value to the constructor, as follows:
<script type="text/javascript">
var tf1 = new Spry.Widget.ValidationTextField("textfieldwidget1", "validation_type", {minChars:value, maxChars:value});
</script>