<script>
Object.prototype.lll=1234;
function aaa(){
alert(123456)
}
for (var x in aaa)
{
alert(x)
}
</script>

for循环原始primitive对象,不会循环Function.prototype下面以及Object.prototype下面的基本方法以及属性,所以这很严重

var elements = YAHOO.util.Selector.query("#content p.hello");

query

Bug Fixes in JavaScript 2

October 31, 2007

Open letter to Chris Wilson

Chris,

You seem to be repeating falsehoods in blogs since the Proposed ECMAScript 4th E

兼容所有浏览器的块移动代码，主要在于事件的选择和event以及keyCode和which上面, 使用A S D F控制
<div id="test" style="width:200px;height:100px;background:blue;position:absolute;top:0px;left:0px;"></div>
<script>
function $(ele){
return document.getElementById(ele);
}
var step=10;
document.onkeypress=function(evt){
var event=window.event || evt;
var temp=((event.keyCode!=0)?event.keyCode:event.which)-32;
switch (temp)
{