关于This
1. 它是一个关键字，并不是变量名或属性名。
2. 它实际指function所关联的对象，如果function没有关联任何对象，则this是Global对象
var msg = 'I am global';
function showMsg(){
alert(this.msg);
};
function nestedShowMsg (){
var nested = function(){
alert(this.msg);
};
nested();
};
var owner = {msg:'I am local'};
owner.showMsg = showMsg;
owner.nestedShowMsg = nestedShowMsg;
showMsg(); //should be 'I am global'
owner.showMsg(); //should be 'I am local'
owner.nestedShowMsg();should be 'I am global'
由于火狐浏览器不支持“removeNode”函数，所以一下代码只支持IE.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
< ......
<mce:script type="text/javascript"><!--
document.write("<table border=1px border-color=red>"); //表格开始
for (h = 1; h <= 10; h++) {
document.write("<tr>"); //开始第一行
for (s = 1; s <= 10; s++) {
var num = (h-1)*10+s; ......
