ok for this to work the user will need to have the page open at the time you want the function to start. thats all.
from this (http://www.w3schools.com/js/tryit.asp?filename=tryjs_timing_clock) page (which i found from this (http://www.w3schools.com/js/js_examples.asp) page with the link, "a clock created with a timing event") i copied the code below:
<html>
<head>
<script type="text/javascript">
function startTime()
{
var today=new Date();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
// add a zero in front of numbers<10
m=checkTime(m);
s=checkTime(s);
document.getElementById('txt').innerHTML=h+":"+m+":"+s;
t=setTimeout('startTime()',500);
}
function checkTime(i)
{
if (i<10)
{
i="0" + i;
}
return i;
}
</script>
</head>
<body onload="startTime()">
<div id="txt"></div>
</body>
</html>
for your purpose, i would change it to this:
<html>
<head>
<script type="text/javascript">
function startTime()
{
var today=new Date();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
var ah="18";
var am="39";
var as="32";
// add a zero in front of numbers<10
m=checkTime(m);
s=checkTime(s);
if (h==ah && m==am && s==as){
document.getElementById('sound').innerHTML="<embed src='sound.wav' />";
//or
document.getElementById('sound').innerHTML="<img dynsrc='sound.wav' />";
//or
document.getElementById('sound').innerHTML="<object classid='clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95'><param name='FileName' value='sound.wav' /></object>";
}
document.getElementById('txt').innerHTML="the alarm is set to: "+ah+":"+am+":"+as+"<br />The current time is: "+h+":"+m+":"+s;
t=setTimeout('startTime()',500);
}
function checkTime(i)
{
if (i<10)
{
i="0" + i;
}
return i;
}
</script>
</head>
<body onload="startTime()">
<div id="txt"></div>
<div id="sound"></div>
</body>
</html>
i tried to learn a little from here (http://www.w3schools.com/media/default.asp), but it wasnt as informative as i would have liked.
i can tell you, i have linux umbuntu 8.0 with firefox 3.0 and i didnt hear any of those sounds on my machine, however i have heard sounds on my windows machine before from those types of objects. maybe this box isnt set up enough for that yet. all i can say is test it for yourself to see how it works for you. you will need to reference whatever sound file you are using.