var showDateShort = 1;
var showDate= 2;
var showDateTime= 3;
var showTime= 4;

function ShowDateTime(dateStyle)
{
        var today = new Date();
        var dStr = "";

        switch (dateStyle)
        {
                case showDateShort:
                        dStr = today.toDateString();
                        break;
                case showDateTime:
                        dStr = today.toLocaleString();
                        break;
                case showTime:
                        dStr = today.toLocaleTimeString();
                        break;
                case showDate:
                default:
                        dStr = today.toLocaleDateString();
                        break;
        }
        document.write(dStr);
}