[jQuery] Converting an interesting script function to jquery:

[Vishal]

if(f = $('product_sort_'+p_nId)){

                for(var i=0; i<f.options.length; i++){
                if(f[i].selected){
                        var temp = new Option(f[i].text,f[i].value,true);

                        if(p_nDirection == 0 && f[i+1] != null ){
                                f[i] =  new 
Option(f[i+1].text,f[i+1].value,false);
                                f[i+1] = temp;
                        }
                        else if(p_nDirection == 1 && f[i-1] != null ){
                                f[i] =  new 
Option(f[i-1].text,f[i-1].value,false);
                                f[i-1] = temp;
                        }


                        break;
                        }
                }

        }


Here is my version of jquery it shows where I get stuck:

        if(dom.query('#product_sort_'+p_nId)){
                dom.query('#product_sort_'+p_nId+' option').each(function(i){
                if(this.selected){
                        var temp = new Option(this.text,this.value,true);

                        //dom.query(this)??
                    if(p_nDirection == 0 && dom.query(this).next() != null ){
                                //**this is where I get stuck: this =
                                this = new
Option(dom.query(this).next().text,dom.query(this).next().value,false);
                                dom.query(this).next() = temp;

                        }
                        else if(p_nDirection == 1 && dom.query(this).prev() != 
null ){
                                dom.query(this) =  new
Option(dom.query(this).prev().text,dom.query(this).prev().value,false);
                                dom.query(this).prev() = temp;
                        }

                }

                });
        }