To get the current date time in Netsuite .

function timestamp() {
var str = "";

var currentTime = new Date();
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
var meridian = "";
if (hours > 12) {
    meridian += "pm";
} else {
    meridian += "am";
}
if (hours > 12) {

    hours = hours - 12;
}
if (minutes < 10) {
    minutes = "0" + minutes;
}
if (seconds < 10) {
    seconds = "0" + seconds;
}
str += hours + ":" + minutes + ":" + seconds + " ";

return str + meridian;
}