如果只是将当前时间转成时间戳，可以直接使用new Date().getTime()/1000；但如果是将某个具体时间或日期转成Unix时间戳，ie不支持像new Date(“2013-1-1”) 这样带参数的方法，将返回NaN。
//test alert(getTime("2013-02-03 10:10:10")); alert(getTime("2013-02-03")); alert(getTime("2013-02")); alert(getTime("2013"));
下面这个将时间戳转换成日期格式的函数，支持自定义的日期格式，效果类似PHP的date函数，同样支持ie6+，谷歌，火狐等浏览器。这个函数是网友实现的，以后有时间我也写一个出来 ^_^
// Week
W: function(){
var a = f.z(),b = 364 + f.L() - a;
var nd2,nd = (new Date(jsdate.getFullYear() + "/1/1").getDay() || 7) - 1;
if(b <= 2 && ((jsdate.getDay() || 7) - 1) <= 2 - b){
return 1;
} else{
if(a <= 2 && nd >= 4 && a >= (6 - nd)){
nd2 = new Date(jsdate.getFullYear() - 1 + "/12/31");
return date("W",Math.round(nd2.getTime()/1000));
} else{
return (1 + (nd <= 3 ? ((a + nd) / 7) : (a - (7 - nd)) / 7) >> 0);
}
}
},
// Month
F: function(){return txt_months[f.n()]},
m: function(){return pad(f.n(),
M: function(){return f.F().substr(0,
n: function(){return jsdate.getMonth() + 1},
t: function(){
var n;
if( (n = jsdate.getMonth() + 1) == 2 ){
return 28 + f.L();
} else{
if( n & 1 && n < 8 || !(n & 1) && n > 7 ){
return 31;
} else{
return 30;
}
}
},
// Year
L: function(){var y = f.Y();return (!(y & 3) && (y % 1e2 || !(y % 4e2))) ? 1 : 0},
//o not supported yet
Y: function(){return jsdate.getFullYear()},
y: function(){return (jsdate.getFullYear() + "").slice(2)},
// Time
a: function(){return jsdate.getHours() > 11 ? "pm" : "am"},
A: function(){return f.a().toUpperCase()},
B: function(){
// peter paul koch:
var off = (jsdate.getTimezoneOffset() + 60)60;
var theSeconds = (jsdate.getHours() 3600) + (jsdate.getMinutes() * 60) + jsdate.getSeconds() + off;
var beat = Math.floor(theSeconds/86.4);
if (beat > 1000) beat -= 1000;
if (beat < 0) beat += 1000;
if ((String(beat)).length == 1) beat = "00"+beat;
if ((String(beat)).length == 2) beat = "0"+beat;
return beat;
},
g: function(){return jsdate.getHours() % 12 || 12},
G: function(){return jsdate.getHours()},
h: function(){return pad(f.g(),
H: function(){return pad(jsdate.getHours(),
i: function(){return pad(jsdate.getMinutes(),
s: function(){return pad(jsdate.getSeconds(),
//u not supported yet
// Timezone
//e not supported yet
//I not supported yet
O: function(){
var t = pad(Math.abs(jsdate.getTimezoneOffset()/60*100),4);
if (jsdate.getTimezoneOffset() > 0) t = "-" + t; else t = "+" + t;
return t;
},
P: function(){var O = f.O();return (O.substr(0,3) + ":" + O.substr(3,2))},
//T not supported yet
//Z not supported yet
// Full Date/Time
c: function(){return f.Y() + "-" + f.m() + "-" + f.d() + "T" + f.h() + ":" + f.i() + ":" + f.s() + f.P()},
//r not supported yet
U: function(){return Math.round(jsdate.getTime()/1000)}
};
return format.replace(/[\]?([a-zA-Z])/g,function(t,s){
if( t!=s ){
// escaped
ret = s;
} else if( f[s] ){
// a date function exists
ret = f[s]();
} else{
// nothing special
ret = s;
}
return ret;
});
}
//test alert(date('Y-m-d H:i:s',(new Date).getTime()/1000)); alert(date('Y-m-d',(new Date).getTime()/1000)); alert(date('Y-m-d H:i:s','1355252653'));
