JS把格林威治时间转换为北京标准时间详解编程语言

function fermitTime(time){ 
var now = new Date(time); 
var year = now.getFullYear(); 
var mon = now.getMonth()+1; 
var date= now.getDate(); 
if(mon<10){ 
mon = '0'+mon; 
}; 
if(date<10){ 
date = '0'+date; 
} 
var postDate = year+'-'+mon+'-'+date; 
return postDate; 
} 
alert(fermitTime(‘格林威治时间字符串’));