[jQuery] Rewrite

[jQuery] Rewrite


How to rewrite this into jquery code ?
Just getting into that... so i need some example. Thanks.
        var upload_button = document.theForm.action_upload;
        var upload_url = "test";
        var append_vars = "";
        for (var i=0;i<document.theForm.length;i++)
        {
            current = document.theForm.elements[i];
            var new_vars = "";
            if ((current.type == "text") || (current.type == "hidden"))
            {
                new_vars = current.name + "=" + encodeURIComponent(current.value);
            }
            else if( (current.type == "radio") || (current.type == "checkbox"))
            {
                if(current.checked)
                {
                    new_vars = current.name + "=" +
encodeURIComponent(current.value);
                }
            }
            if (new_vars)
            {
                append_vars += "&" + new_vars.replace(/\./g, "%2E");
            }
        }
        up.SetVariable("upload_to", upload_url + append_vars);