function GetDateString(n){var oDate = new Date();var month = oDate.getMonth() + 1;if (month <= 9);month = “0″ + month;var day = oDate.getDate();if (day <= 9);day = “0″ + day;var sDate = oDate.getYear() + “-” + month + “-” + day;var   d   = new Date(oDate.getYear() + “/” + month + “/” + day); d.setDate(d.getDate()+n);var   date=(d.getYear())+   “-”+(d.getMonth()+1)+   “-”+(d.getDate())+   “”;   return date;} alert(GetDateString(1));//1为加1、-1为-1

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