Answer to Yamini Surender's Question

//########## CLIENTSCRIPT ##########

var CURRENTRECORDMODULE;
define(['N/currentRecord'], runClientscript);

function runClientscript(currentRecord){
    CURRENTRECORDMODULE = currentRecord;

    //*********** HELPER FUNCTIONS ***********
    function create_amort_schedule() {
        var currentRec = CURRENTRECORDMODULE.get();
        var v_loan_pymt_mthd = currentRec.getValue({
            fieldId:'custrecordpfg_adv_loan_pymt_type'
        });
        alert(v_loan_pymt_mthd);
        return;
    }

    var returnObj = {};
    returnObj.create_amort_schedule = create_amort_schedule;
    return returnObj;
}

//########## USEREVENT ##########
var WIDGETMODULE;
/**
 *@NApiVersion 2.x
 *@NModuleScope Public
 *@NScriptType UserEventScript
 */
define(['N/ui/serverWidget'], runUserEvent);

function runUserEvent(widget) {
    WIDGETMODULE = widget;

    var returnObj = {};
    returnObj.beforeLoad = beforeLoad;
    return returnObj;
}

function beforeLoad(context) {
    if (context.type == context.UserEventType.VIEW) {
      context.form.addButton({
        id : 'custpage_some_button',
        label : 'Schedule',
        functionName : 'create_amort_schedule'
      });
    }
    return;
}