#&q=car&category=Car%20Audio%2CAccessories&brand=

I borrowed a this function from a previous question asked on SO:

function insertParam(key, value)

{

key = escape(key); value = escape(value);



var kvp = document.location.hash.substr(1).split('&');



var i=kvp.length; var x; while(i--) 

{

    x = kvp[i].split('=');



    if (x[0]==key)

    {

            x[1] = value;

            kvp[i] = x.join('=');

            break;

    }

}



if(i<0) {kvp[kvp.length] = [key,value].join('=');}



//this will reload the page, it's likely better to store this until finished



document.location.hash = kvp.join('&'); 

}

I use it like this:

    insertParam(category,xy);

    insertParam(brand,zy);

My problem is it is decoding comma's to %2C. I know I can handle the characters on the server side, but how can I make it look pretty with javascript? By pretty I mean replace %2c with a comma.