bessel/index.html

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<!DOCTYPE html>
<!-- bessel.js (C) 2013-present SheetJS http://sheetjs.com -->
<!-- vim: set ts=2: -->
<html>
<head>
<title>Bessel Live Demo</title>
<script src="bessel.js"></script>
<script src="https://cdn.rawgit.com/SheetJS/printj/master/printj.js"></script>
</head>
<body>
<b>Bessel Live Demo</b><br />
<a href="https://github.com/SheetJS/bessel">Source Code</a><br />
<a href="https://github.com/SheetJS/bessel/issues">Issues? Something look weird? Click here and report an issue</a><br />
<br />
<table>
<tr><td><b>Number:</b></td><td><input type="text" id="val" value="1.5"></td></tr>
<tr><td><b>Order:</b></td><td><input type="text" id="ord" value="1"></td></tr>
<tr><td colspan="2">&nbsp;</td></tr>
<tr><td colspan="2"><b><pre id="jt">J</pre></b></td></tr>
<tr><td colspan="2"><b><pre id="yt">Y</pre></b></td></tr>
<tr><td colspan="2"><b><pre id="it">I</pre></b></td></tr>
<tr><td colspan="2"><b><pre id="kt">K</pre></b></td></tr>
</table>
</body>
<script>
/*jshint browser:true */
var V = document.getElementById('val');
var O = document.getElementById('ord');
var J = document.getElementById('jt');
var Y = document.getElementById('yt');
var I = document.getElementById('it');
var K = document.getElementById('kt');
function update() {
var v = Number(V.value);
var o = Number(O.value);
if(v !== v) { J.innerHTML=Y.innerHTML=I.innerHTML=K.innerHTML = "Value |" + V.value + "| not valid"; return; }
if(o !== o) { J.innerHTML=Y.innerHTML=I.innerHTML=K.innerHTML = "Order |" + O.value + "| not valid"; return; }
o |= 0;
try { J.innerHTML = PRINTJ.sprintf("J(%.11g, %d) = %+.11g", v, o, BESSEL.besselj(v, o)); } catch(e) { J.innerHTML = String(e); }
try { Y.innerHTML = PRINTJ.sprintf("Y(%.11g, %d) = %+.11g", v, o, BESSEL.bessely(v, o)); } catch(e) { Y.innerHTML = String(e); }
try { I.innerHTML = PRINTJ.sprintf("I(%.11g, %d) = %+.11g", v, o, BESSEL.besseli(v, o)); } catch(e) { I.innerHTML = String(e); }
try { K.innerHTML = PRINTJ.sprintf("K(%.11g, %d) = %+.11g", v, o, BESSEL.besselk(v, o)); } catch(e) { K.innerHTML = String(e); }
}
/* Bind to relevant events */
if(O.addEventListener) {
O.addEventListener('keyup', update);
V.addEventListener('keyup', update);
J.addEventListener('change', update);
Y.addEventListener('change', update);
I.addEventListener('change', update);
K.addEventListener('change', update);
} else if(O.attachEvent) {
O.attachEvent('onkeyup', update);
V.attachEvent('onkeyup', update);
J.attachEvent('onchange', update);
Y.attachEvent('onchange', update);
I.attachEvent('onchange', update);
K.attachEvent('onchange', update);
} else {
O.oninput = update;
V.oninput = update;
J.onchange = update;
Y.onchange = update;
I.onchange = update;
K.onchange = update;
}
window.onload = function() { update(); };
</script>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36810333-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</html>