《JavaScript高级程序设计2》学习笔记——BOM

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var leftPos = (typeof window.screenLeft == "number") ? window.screenLeft : window.screenX;
var topPos = (typeof window.screenTop == "number") ? window.screenTop : window.screenY;
//alert(leftPos + "," + topPos);
//
alert(top.screenX);
window.moveTo(0, 0);
window.moveBy(
100, 100);


var pageWidth = window.innerWidth;
var pageHeight = window.innerHeight;
if(typeof pageWidth != "number") {
if(document.compatMode == "CSS1Compat") {
pageWidth
= document.documentElement.clientWidth;
pageHeight
= document.documentElement.clientHeight;
}
else {
pageWidth
= document.body.clientWidth;
pageHeight
= document.body.clientHeight;
}
}
//document.write("pageWidth : " + pageWidth + " , " + "pageHeight : " + pageHeight);
window.resizeTo(500,500);//调整到500 X 500
window.resizeBy(100,50);//调整到600 X 550


window.open(
"http://ce.sysu.edu.cn/", "_blank");
var ceWin = window.open("http://ce.sysu.edu.cn/", "_blank", "height:400,width:400,top:10,left:10,resizable=yes,status=yes");
alert(ceWin.opener
== window);
if(ceWin == null) {
alert(
"The popup was blocked.");
}
//检测window.onen()方法打开的窗口是否被屏蔽了
var blocked = false;
try {
var ceWin = window.open("http://ce.sysu.edu.cn/", "_blank", "height:400,width:400,top:10,left:10,resizable=yes,status=yes");
if(ceWin == null) {
blocked
= true;
}
}
catch (ex) {
blocked
= true;
}
if(blocked) {
alert(
"The popup was blocked.");
}

setTimeout(
function() {
alert(
"Hello!");
},
1000);
var timeoutId = setTimeout(function() {
alert(
"Hello!");
},
2000);
clearTimeout(timeoutId);
setInterval(
function() {
alert(
"Hello!");
},
1000);
//间歇调用
var num = 0;
var max = 5;
var intervalId = null;
function incrementNumber() {
num
++;
if(num == max) {
clearInterval(intervalId);
alert(
"Done!");
}
}
intervalId
= setInterval(incrementNumber, 500);
//超时调用
var num = 0
var max = 5;
function incrementNumber() {
num
++;
if(num < max) {
setTimeout(incrementNumber,
500);
}
else {
alert(
"Done!");
}
}
setTimeout(incrementNumber,
500);

function getQueryStringArgs() {
var qs = (location.search.length > 0) ? location.search.subString(1) : "";
var args = {};
var value = null, name = null, item = null;
var items = qs.split("&");
for(var i=0, len=items.length; i<len; i++) {
item
= items[i].split("=");
name
= decodeURIComponent(item[0]);
value
= decodeURIComponent(item[1]);
args[name]
= value;
}
return args;
}

alert(navigator.appCodeName);
//Mozilla
//
alert(navigator.appName);
alert(navigator.cookieEnabled);//true
alert(navigator.cpuClass);//x86
alert(navigator.language);//zh-cn
alert(navigator.onLine);//false
alert(navigator.platform);//Win32
alert(navigator.plugins);//
alert(navigator.product);//
alert(navigator.systemLanguage);//zh-cn
alert(navigator.userLanguage);//zh-cn
function hasPlugin(name) {//非IE中检测插件
name = name.toLowerCase();
for(var i=0; i<navigator.plugins.length; i++) {
if(navigator.plugins[i].name.toLowerCase().indexOf(name) > -1) {
return true;
}
}
return false;
}
alert(hasPlugin(
"Flash"));
alert(hasPlugin(
"Java"));*/
function hasIEPlugin(name) {
try{
new ActiveXObject(name);
return true;
}
catch(ex) {
return false;
}
}
alert(hasIEPlugin(
"ShockwaveFlash.ShockwaveFlash"));
posted @ 2011-02-26 16:52  chemdemo  阅读(244)  评论(0编辑  收藏  举报