assignment probs

Dear sir,
i have taken assignment no 3, but i did not understand this line
(Reverse of a string and check whether it is palindrome or not)

thanks sir

Hi Alok,

Just input one string from user, just reverse it,
eg: if alok is a keyword, reverse of a string ll be 'kola'.

and check the initial string and output string are same, if it is same, then alert that its a palindrome. if not 'not a palindrome'

function for reverse of a string,

<script type="text/javascript">

var my_str="siliconindia"

var i=my_str.length;
i=i-1;

for (var x = i; x >=0; x--)
{
document.write(my_str.charAt(x));

}

</script>