How can I setup a clock with defined alarm times which trigger another event?

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Stuffs (My Blog)

<script language="JavaScript"><!--
function makeAlarm()
{
for (i = 0; i<makeAlarm.arguments.length; i++)
{
time = makeAlarm.arguments[i];
this[i] = zero + (Math.floor(time)*60*60*1000) + (time - Math.floor(time))*100*60*1000;
}
alarms = i;
}

var now = new Date();
var zero = (new Date(now.getYear(),now.getMonth(),now.getDate(),0, 0,0)).getTime();
var myAlarms = new makeAlarm(0.00,8.59,11.59,23.59);

function checkAlarm() {
now = new Date();

for (var i=0;i<alarms;i++) {
diff = myAlarms[i]-now.getTime();
if (diff > 0 && diff < 1000*60)
alert(now);
}

setTimeout('checkAlarm()',1000*60); // check every minute
}

checkAlarm();
//--></script>