OK...final answer.
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>untitled</title>
<script type="text/javascript">
//<![CDATA[
$format.RE1 = /^\d*\.?\d*$/;
$format.RE2 = /\.\d{3,}$/;
$format.RE3 = /\.(?=[^.]*\.)/g;
$format.RE4 = /[^\d.]/g;
$format.RE5 = /\.(?=[^.]*\.)/g;
$format.RE6 = /^(\d*\.\d{2}).+$/;
$format.RE7 = /(\.\d{0,1})$/;
function $format(fld, leaving)
{
function sReverse(str)
{
for (var s = '', i = str.length - 1; i != -1; --i)
s += str.charAt(i);
return s;
}
var v = fld.value;
if (!$format.RE1.test(v) || $format.RE2.test(v))
{
var ltdot = (fld.dotpos == v.indexOf('.') ?
v.lastIndexOf('.') < fld.dotpos :
v.indexOf('.') < fld.dotpos);
if (ltdot)
v = sReverse(v);
v = v.replace($format.RE3,'');
if (ltdot)
v = sReverse(v);
v =
v.replace($format.RE4,'').replace($format.RE5,''). replace($format.RE6,'$
1');
fld.value = v;
}
fld.dotpos = v.indexOf('.');
if (leaving)
fld.value = v.replace($format.RE7, '$10').replace($format.RE7, '$10');
}
//]]>
</script>
</head>
<body style="font:110% arial;margin:100px;"
onload="f=document.forms[0];f.reset();f.foo.focus()">
<form onreset="foo.focus()">
$ <input type="text" name="foo" value="" size="10" maxlength="8"
style="text-align:center;border:1px black solid;"
onkeyup="return $format(this,false)"
onblur="return $format(this,true)" />
<input type="reset" value="clear" />
</form>
</body>
</html>
The O.P. seems to be long gone, so, maybe someone else can use
this...good exercise, in any event.
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