/**
     * object: Javascript common library 
     *
     * This object contains functions that can be used on any project
     *
     * notice: prototype javascript framework needed          
     *
     * Slavisa Miljanovic <slavisa.miljanovic@softserbia.com>
     * @param  void
     * @return void
    */
    var jsContestTabLib = {
        
        // app main url
        appUrl: '',

        /**
         * function: Hio offer from on contest tab - first step
         * 
         * It checkes which button is clicked
         * 
         * Slavisa Miljanovic <slavisa.miljanovic@softserbia.com>
         * @param  string $formId
         * @param  string $buttonId
         * @return null
        */
        offerFormButtonClicked: function(formId, buttonId) {
            var url = '';
            url += this.appUrl + '/hio/contest_tab_hio_offer';
            
            var params = '';
            // get form elements values
            params  = jsCommonLib.getFormParams(formId);
            // insert into the params which button is clicked
            params += '&' + buttonId + '=true';

            // make ajax request object
            var ajaxRequest = new Ajax.Updater({success: 'div_tabs_content'}, url, {method: 'post', parameters: params, onSuccess: ''});
        }
    }