How to use prototype in javascript thatinherit from string Object and implements custom function -

i have funtionas follow,

function revstr(s) {     ns = '';      (i = s.length - 1; >= 0; i--)     ns += s[i];     alert(ns); }

i have been asked implement using prototype totally unaware of in javascript(i phpdeveloper:( )

i have create object inherits string object . think can

var mystring= new string();

and implement function revstr using somethingcalled prototype in javascript

can me out in .

thanks

that means want add revstr() string.prototype, strings can revstr().

you can implement function string prototype by:

string.prototype.revstr = function(){     ns = '';     (i = this.length - 1; >= 0; i--)         ns += this[i];     alert(ns); }

so can use function on string afterwards this:

'hello world'.revstr(); 'fooobarrrr'.revstr();

Brant