We would like to know how to replace a string by range.
<!DOCTYPE html>
<html>
<body>
<script type='text/javascript'>
<!-- w ww .j av a2 s . c o m-->
var str = "this is a string";
var result = "that" + str.substring(4);
document.writeln(result);
</script>
</body>
</html>
The code above is rendered as follows: