jquery获取日期

function getParamDate(n){

    var date = new Date();

    date.setDate(date.getDate() + n);

    var year = date.getFullYear();

    var month = date.getMonth + 1;

    if(month < 10){

        month = "0" + month;

    else{

        month = "" + month;

    }

    var day = date.getDate();

    if(day< 10){

        day= "0" + day;

    else{

        day= "" + day;

    }

    var str = year + month + day;

}