pretty simple regex replace help needed

[tgh003@gmail.com]

I need to replace a number in a string

str = "http://www.example.com ?test=1&cat=0&r ef=123213123213 ";

I want to replace the 0 after the cat= part with a new number. 0 could
be any number though so i need to use a reg exp to replace it.

str = str.replace(??? ???,newnumber);

I need help with the ?????? part :>

Any help is greatly appreciated.

Thx!

[moi]

Re: pretty simple regex replace help needed

function reDemo() {
var r = new RegExp(/=0/)
var lnk = "http://www.example.com ?test=1&cat=0&r ef=123213123213 ";
var newlnk = lnk.replace( r, "=123" );
alert( newlnk );
}



<tgh003@gmail.c om> schreef in bericht
news:1114397965 .687064.126720@ f14g2000cwb.goo glegroups.com.. .[color=blue]
>I need to replace a number in a string
>
> str = "http://www.example.com ?test=1&cat=0&r ef=123213123213 ";
>
> I want to replace the 0 after the cat= part with a new number. 0 could
> be any number though so i need to use a reg exp to replace it.
>
> str = str.replace(??? ???,newnumber);
>
> I need help with the ?????? part :>
>
> Any help is greatly appreciated.
>
> Thx!
>[/color]

[Lee]

Re: pretty simple regex replace help needed

tgh003@gmail.co m said:[color=blue]
>
>I need to replace a number in a string
>
>str = "http://www.example.com ?test=1&cat=0&r ef=123213123213 ";
>
>I want to replace the 0 after the cat= part with a new number. 0 could
>be any number though so i need to use a reg exp to replace it.
>
>str = str.replace(??? ???,newnumber);
>
>I need help with the ?????? part :>[/color]

str = str.replace(/cat=\d+/,"cat="+newnumb er);