JavaScript利用DOM给页面添加内容
自定义一个log函数,输出传入函数的对象或者信息.
Log.js
// JScript source code
function
log(category, message, object) {
// If this category is explicitly disabled, do nothing
if
(log.options[category + "Disabled
"]) return
;
// Find the container
var
id = category + "_log
";
var
c = document
.getElementById(id);
// If there is no container, but logging in this category is enabled,
// create the container.
if
(!c && log.options[category + "Enabled
"]) {
c = document
.createElement("div
");
c.id = id;
c.className = "log
";
document
.body.appendChild(c);
}
// If still no container, we ignore the message
if
(!c) return
;
// If timestamping is enabled, add the timestamp
if
(log.options.timestamp)
message = new
Date
() + ":
" + (message ? message : "");
// Create a element to hold the log entry
var
entry = document
.createElement("div
");
entry.className = category + "_message
";
if
(message) {
// Add the message to it
entry.appendChild(document
.createTextNode(message));
}
if
(object && typeof
object == "object
") {
entry.appendChild(log.makeTable(object, 0));
}
// Finally, add the entry to the logging container
c.appendChild(entry);
}
// Create a table to display the properties of the specified object
log.makeTable = function
(object, level) {
// If we've reached maximum recursion, return a Text node instead.
if
(level > log.options.maxRecursion)
return
document
.createTextNode(object.toString
());
// Create the table we'll be returning
var
table = document
.createElement("table
");
table.border = 1;
// Add a Name|Type|Value header to the table
var
header = docum
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javascript中event.keycode
keycode 8 = BackSpace BackSpace
keycode 9 = Tab Tab
keycode 12 = Clear
keycode 13 = Enter
keycode 16 = Shift_L
keycode 17 = Control_L
keycode 18 = Alt_L
keycode 19 = Pause
keycode 20 = Caps_Lock
keycode 27 = Escape Escape
keycode 32 = space space ......
看书的时候遇到这样一个问题，程序代码如下
var ob = function(){
var obj = this;
function fn1(){
alert( obj === window );//false
alert( this === window );//ture
}
this.fn2 = function() {
fn1();
}
}
当时很不明白fn1里面第二个alert的结果，为 ......
类是什么？
许多刚接触编程的朋友都可能理解不了类，其实类是对我们这个现实世界的模拟，把它说成“类别”或者“类型”可能会更容易理解一些。比如“人”这种动
物就是一个类，而具体某一个人就是“人”这个类的一个实例
，
“� ......
<html>
<mce:script type="text/javascript"><!--
function checkedAll(checked)
{
var ckbArray=document.getElementsByName('ckb');
for(var i=0,len=ckbArray.length;i<len;i++)
{
ckbArray[i].checked=checked;
}
}
function clickbutton()
{
var ckbArra ......
用javascript显示XML
你可以用JavaScript显示XML。可以用JavaScript (或 VBScript)从一个XML文件中输入数据并在一个HTML页面内显示XML数据。 要看看XML和HTML是如何相互补充的，可以这样做：首先找到XML 文档(note.xml)，然后打开HTML文档
(note.htm)，这个HTML文档中包含了阅读X ......
