Determine position of letter by inserting number, output letter

[gazz]

Hi,

Please could someone shed some light on this as I am really struggling to understand how to do this.

Given a word entered into a window.prompt EG "forum", how do I create a script to determine the postion of a letter by entering a number no longer than the string and output that letter to screen.

I have completed the prompting and selection the bold section below is where I become stuck. Any help would be appreciated greatly.
EG

prompt - enter a word no more than 5 characters

user submit "forum"

prompt - select a number from 1 to 5

user submit "2"

write - your chosen letter is o


Regards,

Gazz

[iam_clint]

this was an easy one so i wrote a pretty good example up for you. please respond with anything you don't understand in this script and i will explain it further.

<script>
window.onload = getLetter();
function getLetter() {
var resp = "";
resp = window.prompt("type in a 5 letter word", "");
if (resp.length!=5) { alert("You did not type in a 5 letter word!"); getLetter(); return false; }
var num = 0;
num = window.prompt("Select a number 1-5", "");
num = parseFloat(num);
if (num>0 && num<6) { document.write("Your chosen letter is " + resp.charAt(num-1)); } else { alert("That is not a number 1-5"); getLetter(); return false; }
return true;
}
</script>
 

[gazz]

Hi Thanks iam_clint,

Greatly appreciate your help.

Strange how once you see something work you realise how it should have been done.

Once again thanks.

Gary