【测试工具】一个将Unix时间转换为通用时间的工具

function calctime2(){

var time = window.document.getElementById("inpTime").value;
if ( time == "" )
{
alert("时间为空，请重新输入");
return;
}

if ( isDigit(time) == false )
{
alert("时间只能由数字组成");
return;
}

document.write( millisecondsStrToDate( time * 1000 ));
}

function isDigit(s) {
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec(s)) return false
return true
}

function millisecondsStrToDate(str){
var startyear = 1970;
var startmonth = 1;
var startday = 1;

var d , s;
var sep = ":";

d = new Date();
d.setFullYear( startyear , startmonth , startday );
d.setTime(0);
d.setMilliseconds(str);
s = d.getYear() + "-" + (d.getMonth() + 1) + "-" + d.getDate() + " " + d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
//alert( d.toLocaleString());
return d.toLocaleString();
}