Very simple JavaScript code to restrict text box to have floating point number. Code is here-
<!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">
<head>
<title>Untitled Page</title>
<script type="text/javascript">
function restrict(val, e) {
var keyChar;
if (window.event)
keyChar = String.fromCharCode(window.event.keyCode);
else if (e)
keyChar = String.fromCharCode(e.which);
else
return true;
var number = parseFloat(val + keyChar);
if (number != val + keyChar)
return false;
else
return true;
}
</script>
</head>
<body>
<input name="number" onkeypress="return restrict(this.value, event)">
</body>
</html>
