Equivalent of VB's Right$() function? 1

[techkate]

I'm new to Javascript, please bear with me. I've done some searching for this, haven't quite found what I was looking for. Looked in the FAQ's here too.

I have a filename, let's say, of 'MyFile.xls'.

I want to strip off the filename and preserve it, so I would have two variables:

string1 = 'MyFile'
string2 = '.xls'


I will append a timestamp to string1 (I've looked this up on the web and it seems pretty simple so I think I can manage it):

string1 = string1 + timestamp


Then I want to append string2 back onto string1:

string1 = string1 + string2


Could anyone help me with this or point me in the right direction please? I've found a few websites that touch JavaScript parsing, but mostly only splitting. Not more complex situations like finding the first decimal from the right. I wish JScript had VB's parsing functions.

Thanks for your time.
Kate

 

[kaht]

You'll want to use the lastIndexOf method combined with the substr method (or substring if that suits you better, I prefer substr):

<script type="text/javascript">

function blah(str) {
   var pos = str.lastIndexOf(".");
   if (pos != -1) {
      var string1 = str.substr(0, pos);
      var string2 = str.substr(pos, str.length - pos);
      var timestamp = "03/21/2006";
      string1 = string1 + timestamp;
      alert(string1 + string2);
   }
   else {
      alert("decimal could not be found");
   }
}

</script>
<input type="text" id="txt" />
<input type="button" value="Click me" onclick="blah(document.getElementById('txt').value)" />

-kaht

[small] <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <B> <P> <.</B>[/small]
[small](He's back)[/small]

 

[techkate]

Thanks, kaht, that worked like a charm!


Yeah, it's a non-nutritive cereal varnish. It's semi-permeable. It's not osmotic.
What it does is it coats and seals the flake, prevents the milk from penetrating it."