Prototype实战教程----2.$A
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>$A</title>
<script language="javascript" src="prototype.js"
type="text/javascript"></script>
<script language="javascript" type="text/javascript">
function showOptions() {
var someNodeList = $("lstFramework").getElementsByTagName("option");
var nodes = $A(someNodeList);
var info = [];
nodes.each (function(node){
info.push(node.value + ": " + node.innerHTML);
});
alert(info.join("rn"));
}
</script>
</head>
<body>
<form>
<select id="lstFramework" size="10">
<option value="1">Prototype</option>
<option value="2">Script.aculo.us</option>
<option value="3">Dojo</option>
<option value="4">YUI</option>
</select>
<input onclick="showOptions();" type="button" value="Show the options">
</form>
</body>
</html>
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