<html>
<head>
<title>Happy Codings :-) JavaScript Code Examples</title>
<script language="JavaScript">
function goAccept() { 
    document.all.myB.accept = "image/gif"; 
}
</script>
</head>
<body onLoad="goAccept();">
<input type="text" 
       name="textfield" 
       size="50" 
       accept="image/gif" 
       value='The content type of this field is "text/html"'>
<input type="button" 
       id="myB" 
       value='The content type for this button is "image/gif"'>
</body>
</html>