// Yields today's date/time: YYYYMMDDHH

function zpad ( value ) { return ( value < 10 ? "0" + value: value ); }

var today  = new Date();
var tyear  = today.getYear();
var tyear  = (( tyear < 1000 ) ? tyear + 1900 : tyear);
var tmonth = zpad ( today.getMonth() + 1 );
var tdate  = zpad ( today.getDate() );
var thour  = zpad ( today.getHours() );
var tnow   = tyear + '' + tmonth + '' + tdate + '' + thour;
var tmd    = tmonth + '' + tdate;