function swapInnerHtml(id,newHtml) {
        var obj = document.getElementById(id);
        obj.innerHTML = newHtml;
    }

    function setValue(id, value) {
        var obj = document.getElementById(id);
        if( obj ){
            obj.value = value;
        }
    }

    function submitAjaxForm(actionUrl, formName, callbackFunction){
        new Ajax.Request(actionUrl, { 
                    method: 'post',
                    parameters: $(formName).serialize(true),
                    onComplete: callbackFunction
                }
            );
    }