JavaScript: Calculator Script

Main Calculator Script Beat Counter

<!-- TWO STEPS TO INSTALL BEAT COUNTER:

1.  Copy this part of code inside your HTML HEAD

2.  Add the last code into the BODY of your HTML document  -->

<HEAD><title>JavaScript, java script, javascripts, script, javascript free code!</title>

<!-- Begin

secs2 = 0;

count = 0;

allBpm = 0;

avgBpm = 0;

bpm = 0;

ns = (navigator.appName == 'Netscape');

ie = (navigator.appName == 'Microsoft Internet Explorer');

function bpmCounter(e) {

if (ns) clearBpm = e.which;

else if (ie) clearBpm = event.button;

timeSeconds = new Date;

secs = timeSeconds.getTime();

if (count == 0) {

document.BEATSPERMINUTE.AVG.value = "";

document.BEATSPERMINUTE.NOW.value = "READY!  Start NOW!";

document.BEATSPERMINUTE.HIT.value = "";

document.BEATSPERMINUTE.ACG.value = "";

document.BEATSPERMINUTE.NCG.value = "";

secs2 = secs;

count++;

}

else {

oldBpm = bpm;

bpm = (1 / ((secs - secs2) / 1000)) * 60;

bpmChg = (Math.round((bpm - oldBpm) * 10)) / 10;

count++;

allBpm = allBpm + bpm;

oldAvg = avgBpm;

avgBpm = allBpm / (count - 1);

avgChg = (Math.round((avgBpm - oldAvg) * 10)) / 10;

secs2 = secs;

if (bpmChg >= 0) { PbpmChg = "+" + bpmChg } else { PbpmChg = bpmChg }

if (avgChg >= 0) { PavgChg = "+" + avgChg } else { PavgChg = avgChg }

document.BEATSPERMINUTE.AVG.value = (Math.round(avgBpm * 100)) / 100;

document.BEATSPERMINUTE.ACG.value = PavgChg;

document.BEATSPERMINUTE.NOW.value = (Math.round(bpm * 100)) / 100;

document.BEATSPERMINUTE.NCG.value = PbpmChg;

document.BEATSPERMINUTE.HIT.value = count;

}

return true;

}

document.onkeydown = bpmCounter;

document.onmousedown = bpmCounter;

//  End -->

</script>

</HEAD>

<BODY>

<tr><td><font color="#000000"><tt>AVERAGE BPM</tt></td>

<tr><td><font color="#000000"><tt>ONCLICK BPM</tt></td>

<tr><td><font color="#000000"><tt>TIMING HITS</tt></td>

</table>

</td></tr></table>

Click on the page to start the bpm counter<p>

Press a key or click your mouse to measure beats.<br>

You may also <input type=reset value="RESET "> the counter.<br>

Netscape 4.x+ and MSIE 4.x+ compatible.<p>

</form>

</table>

</center>

<font face="arial, helvetica" size="-2">Free JavaScripts<br>

by <a href="http://script.omduena.com">Your Free JavaScript World</a></font>

</center><p>

Click Here if you need help to install the JavaScript

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