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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/1998/REC-html40-19980424/loose.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>J</title>
<link rel="stylesheet" href="../doc.css" type="text/css">
</head>
<body>
<h1>J</h1>
<dl>
<dt><a name="+JS"><code>+JS</code></a>
<dd>+JS is a Javascript prefix class. When a +Button uses this prefix, it
will POST the page using Javascript. This may lead to a faster response and
avoids flicker caused by reloading and rendering the page. More information
is available in the <a href="../app.html#jsButtons">application
tutorial</a>. See also <a href="refB.html#+Button">+Button</a>.
</dl>
<dl>
<dt><a name="+JsField"><code>+JsField</code></a>
<dd>This field can be used to hold Javascript-driven context. Setting Google
Maps images would be one example:
<pre><code>
(gui '(+JS +Button) "@img/mapicon.gif" "@img/no.png"
'(set> (: home map) (path> (: home obj) 40)) )
...
(<p> '((id . map) (style . "width: 600px; height: 400px"))
(gui 'map '(+JsField) "showMap") )
</code></pre>
See also <a href="refG.html#+gui">+gui</a>.
</dl>
</body>
</html>
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