a=new Date(time); a=a.valueOf(); a = a - 1 * 24 * 60 * 60 * 1000; a=new Date(a); var m=a.getMonth() + 1; var day= a.getDate(); if(m<10) m='0'+m; if(day<10) day='0'+day; a=a.getFullYear() + "-" + m + "-" + day;