在JS中如何把毫秒转换成规定的日期时间格式

 1 Date.prototype.toLocaleString = function() {
 2                               return this.getFullYear() + "-" + (this.getMonth() + 1) + "-" + this.getDate() + " " + this.getHours() + ":" + this.getMinutes() + ":" + this.getSeconds();
 3                         };
 4 
 5 success:function(data){
 6                     var Str="";    
 7                     var length = data.length;
 8                     for(var i=0;i<length;i++){    
 9                          //Str += ‘<tr><td>‘+data[i].roleId+‘</td><td>‘+data[i].roleName+‘</td><td>‘+data[i].remarks+‘</td><td>‘+data[i].createBy+‘</td><td>‘+data[i].createDate+‘</td><td>‘+data[i].updateBy+‘</td><td>‘+data[i].updateDate+‘</td><td>‘+data[i].status+‘</td></tr>‘;
10                         Date.prototype.toLocaleString = function() {
11                               return this.getFullYear() + "-" + (this.getMonth() + 1) + "-" + this.getDate() + " " + this.getHours() + ":" + this.getMinutes() + ":" + this.getSeconds();
12                         };
13                         Str += "<tr>" +
14                          "<td class=\"tbody_check\">" +
15                             "<span class=\"check\">" +
16                                 "<input type=\"checkbox\" value=\""+data[i].roleId+"\" name=\"checkbox\">" +
17                             "</span>" +
18                          "</td>" +
19                          "<td>" +data[i].roleId+"</td>" +
20                          "<td>" +data[i].roleName+"</td>" +
21                          "<td>" +data[i].remarks+"</td>" +
22                          "<td>" +data[i].createBy+"</td>" +
23                          "<td>" +new Date(data[i].createDate).toLocaleString()+"</td>" +
24                          "<td>" +data[i].updateBy+"</td>" +
25                          "<td>" +new Date(data[i].updateDate).toLocaleString()+"</td>" +
26                          "<td>" +data[i].status+"</td>" +
27                      "</tr>";
28                     }
29                     $("#rolelist").html(Str);
30                 }