javascript38种小技巧，推荐新手查看
- 事件源对象
event.srcElement.tagName
event.srcElement.type - 捕获释放
event.srcElement.setCapture();
event.srcElement.releaseCapture(); - 事件按键
event.keyCode
event.shiftKey
event.altKey
event.ctrlKey - 事件返回值
event.returnValue - 鼠标位置
event.x
event.y - 窗体活动元素
document.activeElement - 绑定事件
document.captureEvents(Event.KEYDOWN); - 访问窗体元素
document.all("txt").focus();
document.all("txt").select(); - 窗体命令
document.execCommand - 窗体COOKIE
document.cookie - 菜单事件
document.oncontextmenu - 创建元素
document.createElement("SPAN"); - 根据鼠标获得元素：
document.elementFromPoint(event.x,event.y).tagName=="TD
document.elementFromPoint(event.x,event.y).appendChild(ms) - 窗体图片
document.images[索引] - 窗体事件绑定
document.onmousedown=scrollwindow; - 元素
document.窗体.elements[索引] - 对象绑定事件
document.all.xxx.detachEvent('onclick',a); - 插件数目
navigator.plugins - 取变量类型
typeof($js_libpath) == "undefined" - 下拉框
下拉框.options[索引]
下拉框.options.length - 查找对象
document.getElementsByName("r1");
document.getElementById(id); - 定时
timer=setInterval('scrollwindow()',delay);
clearInterval(timer); - UNCODE编码
escape() ,unescape - 父对象
obj.parentElement(dhtml)
obj.parentNode(dom) - 交换表的行
TableID.moveRow(2,1) - 替换CSS
- 并排显示
display:inline - 隐藏焦点
hidefocus=true - 根据宽度换行
style="word-break:break-all" - 自动刷新
<meta HTTP-EQUIV="refresh" CONTENT="8;URL=http://c98.yeah.net"> - 简单邮件
<a href="mailto:[email protected]?subject=ccc&body=xxxyyy"> - 快速转到位置
obj.scrollIntoView(true) - 锚
<a name="first">
<a href="#first">anchors</a> - 网页传递参数
location.search(); - 可编辑
obj.contenteditable=true - 执行菜单命令
obj.execCommand - 双字节字符
/[^\x00-\xff]/
汉字
/[\u4e00-\u9fa5]/ - 让英文字符串超出表格宽度自动换行
word-wrap: break-word; word-break: break-all; - 透明背景
<IFRAME src="1.htm" width=300 height=180 allowtransparency></iframe> - 获得style内容
obj.style.cssText - HTML标签
document.documentElement.innerHTML - 第一个style标签
document.styleSheets[0] - style标签里的第一个样式
document.styleSheets[0].rules[0] - 防止点击空链接时，页面往往重置到页首端。
<a href="javascript:function()">word</a> - 上一网页源
asp:
request.servervariables("HTTP_REFERER")
javascript:
document.referrer - 释放内存
CollectGarbage(); - 禁止右键
document.oncontextmenu = function() { return false;} - 禁止保存
<noscript><iframe src="*.htm"></iframe></noscript> - 禁止选取<body oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false" onmouseup="document.selection.empty()>
- 禁止粘贴
<input type=text onpaste="return false"> - 地址栏图标
<link rel="Shortcut Icon" href="favicon.ico">
favicon.ico 名字最好不变16*16的16色,放虚拟目录根目录下 - 收藏栏图标
<link rel="Bookmark" href="favicon.ico"> - 查看源码
<input type=button value=查看网页源代码 onclick="window.location = 'view-source:'+ 'http://www.csdn.net/'"> - 关闭输入法
<input style="ime-mode:disabled"> - 自动全选
<input type=text name=text1 value="123" onfocus="this.select()"> - ENTER键可以让光标移到下一个输入框
<input onkeydown="if(event.keyCode==13)event.keyCode=9"> - 文本框的默认值
<input type=text value="123" onfocus="alert(this.defaultValue)"> - title换行
obj.title = "123
sdfs " - 获得时间所代表的微秒
var n1 = new Date("2004-10-10".replace(/-/g, "\/")).getTime() - 窗口是否关闭
win.closed - checkbox扁平
<input type=checkbox style="position: absolute; clip:rect(5px 15px 15px 5px)"><br> - 获取选中内容
document.selection.createRange().duplicate().text - 自动完成功能
<input type=text autocomplete=on>打开该功能
<input type=text autocomplete=off>关闭该功能 - 窗口最大化
<body onload="window.resizeTo(window.screen.width - 4,window.screen.height-50);window.moveTo(-4,-4)"> - 无关闭按钮IE
window.open("aa.htm", "meizz", "fullscreen=7"); - 统一编码/解码
alert(decodeURIComponent(encodeURIComponent("http://你好.com?as= hehe")))
encodeURIComponent对":"、"/"、";" 和 "?"也编码 - 表格行指示
<tr onmouseover="this.bgColor='#f0f0f0'" onmouseout="this.bgColor='#ffffff'"> document.all.csss.href = "a.css";
//各种尺寸
s += "\r\n网页可见区域宽：" + document.body.clientWidth;
s += "\r\n网页可见区域高：" + document.body.clientHeight;
s += "\r\n网页可见区域高：" + document.body.offsetWeight +" (包括边线的宽)" ;
s += "\r\n网页可见区域高：" + document.body.offsetHeight +" (包括边线的宽)" ;
s += "\r\n网页正文全文宽：" + document.body.scrollWidth;
s += "\r\n网页正文全文高：" + document.body.scrollHeight;
s += "\r\n网页被卷去的高：" + document.body.scrollTop;
s += "\r\n网页被卷去的左：" + document.body.scrollLeft;
s += "\r\n网页正文部分上：" + window.screenTop;
s += "\r\n网页正文部分左：" + window.screenLeft;
s += "\r\n屏幕分辨率的高：" + window.screen.height;
s += "\r\n屏幕分辨率的宽：" + window.screen.width;
s += "\r\n屏幕可用工作区高度：" + window.screen.availHeight;
s += "\r\n屏幕可用工作区宽度：" + window.screen.availWidth;
s += "\r\n网页可见区域高：" + document.body.clientHeight;
s += "\r\n网页可见区域高：" + document.body.offsetWeight +" (包括边线的宽)" ;
s += "\r\n网页可见区域高：" + document.body.offsetHeight +" (包括边线的宽)" ;
s += "\r\n网页正文全文宽：" + document.body.scrollWidth;
s += "\r\n网页正文全文高：" + document.body.scrollHeight;
s += "\r\n网页被卷去的高：" + document.body.scrollTop;
s += "\r\n网页被卷去的左：" + document.body.scrollLeft;
s += "\r\n网页正文部分上：" + window.screenTop;
s += "\r\n网页正文部分左：" + window.screenLeft;
s += "\r\n屏幕分辨率的高：" + window.screen.height;
s += "\r\n屏幕分辨率的宽：" + window.screen.width;
s += "\r\n屏幕可用工作区高度：" + window.screen.availHeight;
s += "\r\n屏幕可用工作区宽度：" + window.screen.availWidth;
//过滤数字
//特殊用途
//不缓存
//正则匹配
匹配中文字符的正则表达式： [\u4e00-\u9fa5]
匹配双字节字符(包括汉字在内)：[^\x00-\xff]
匹配空行的正则表达式：\n[\s| ]*\r
匹配HTML标记的正则表达式：/<(.*)>.*<\/\1>|<(.*) \/>/
匹配首尾空格的正则表达式：(^\s*)|(\s*$)（像vbscript那样的trim函数）
匹配Email地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配网址URL的正则表达式：http: //([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
以下是例子：
利用正则表达式限制网页表单里的文本框输入内容：
用正则表达式限制只能输入中文：onkeyup= "value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
1.用正则表达式限制只能输入全角字符： onkeyup= "value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
2.用正则表达式限制只能输入数字：onkeyup= "value=value.replace(/[^\d]/g,'') " onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
3.用正则表达式限制只能输入数字和英文：onkeyup= "value=value.replace(/[\W]/g,'') " onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
匹配双字节字符(包括汉字在内)：[^\x00-\xff]
匹配空行的正则表达式：\n[\s| ]*\r
匹配HTML标记的正则表达式：/<(.*)>.*<\/\1>|<(.*) \/>/
匹配首尾空格的正则表达式：(^\s*)|(\s*$)（像vbscript那样的trim函数）
匹配Email地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配网址URL的正则表达式：http: //([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
以下是例子：
利用正则表达式限制网页表单里的文本框输入内容：
用正则表达式限制只能输入中文：onkeyup= "value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
1.用正则表达式限制只能输入全角字符： onkeyup= "value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
2.用正则表达式限制只能输入数字：onkeyup= "value=value.replace(/[^\d]/g,'') " onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
3.用正则表达式限制只能输入数字和英文：onkeyup= "value=value.replace(/[\W]/g,'') " onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
//消除图像工具栏
<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false" >
or
<head>
<meta http-equiv="imagetoolbar" content="no" >
</head>
or
<head>
<meta http-equiv="imagetoolbar" content="no" >
</head>
//无提示关闭
function Close()
{
var ua=navigator.userAgent
var ie=navigator.appName== "Microsoft Internet Explorer" ? true :false
if (ie)
{
var IEversion=parseFloat(ua.substring(ua.indexOf( "MSIE " )+5,ua.indexOf( ";" ,ua.indexOf( "MSIE " ))))
if (IEversion< 5.5)
{
var str = '<object id=noTipClose classid= "clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11" >'
str += '<param name= "Command" value= "Close" ></object>';
document.body.insertAdjacentHTML( "beforeEnd" , str);
document.all.noTipClose.Click();
}
else
{
window.opener = null ;
window.close();
}
}
else
{
window.close()
}
}
{
var ua=navigator.userAgent
var ie=navigator.appName== "Microsoft Internet Explorer" ? true :false
if (ie)
{
var IEversion=parseFloat(ua.substring(ua.indexOf( "MSIE " )+5,ua.indexOf( ";" ,ua.indexOf( "MSIE " ))))
if (IEversion< 5.5)
{
var str = '<object id=noTipClose classid= "clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11" >'
str += '<param name= "Command" value= "Close" ></object>';
document.body.insertAdjacentHTML( "beforeEnd" , str);
document.all.noTipClose.Click();
}
else
{
window.opener = null ;
window.close();
}
}
else
{
window.close()
}
}
//取得控件得绝对位置(1)
<script language=
"javascript" >
function getoffset(e)
{
var t=e.offsetTop;
var l=e.offsetLeft;
while (e=e.offsetParent)
{
t+=e.offsetTop;
l+=e.offsetLeft;
}
var rec = new Array (1);
rec[0] = t;
rec[1] = l;
return rec
}
</script>
function getoffset(e)
{
var t=e.offsetTop;
var l=e.offsetLeft;
while (e=e.offsetParent)
{
t+=e.offsetTop;
l+=e.offsetLeft;
}
var rec = new Array (1);
rec[0] = t;
rec[1] = l;
return rec
}
</script>
//获得控件的绝对位置(2)
oRect = obj.getBoundingClientRect();
oRect.left
oRect.
oRect.left
oRect.
//最小化,最大化,关闭
//光标停在文字最后
<script language=
"javascript" >
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',e.value.length);
r.collapse( true );
r.select();
}
</script>
<input type=text name=text1 value= "123" onfocus= "cc()" >
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',e.value.length);
r.collapse( true );
r.select();
}
</script>
<input type=text name=text1 value= "123" onfocus= "cc()" >
//页面进入和退出的特效
进入页面<meta http-equiv=
"Page-Enter" content=
"revealTrans(duration=x, transition=y)" >
推出页面<meta http-equiv= "Page-Exit" content= "revealTrans(duration=x, transition=y)" >
这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使
用哪种特效，取值为1-23:
0 矩形缩小
1 矩形扩大
2 圆形缩小
3 圆形扩大
4 下到上刷新
5 上到下刷新
6 左到右刷新
7 右到左刷新
8 竖百叶窗
9 横百叶窗
10 错位横百叶窗
11 错位竖百叶窗
12 点扩散
13 左右到中间刷新
14 中间到左右刷新
15 中间到上下
16 上下到中间
17 右下到左上
18 右上到左下
19 左上到右下
20 左下到右上
21 横条
22 竖条
23
推出页面<meta http-equiv= "Page-Exit" content= "revealTrans(duration=x, transition=y)" >
这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使
用哪种特效，取值为1-23:
0 矩形缩小
1 矩形扩大
2 圆形缩小
3 圆形扩大
4 下到上刷新
5 上到下刷新
6 左到右刷新
7 右到左刷新
8 竖百叶窗
9 横百叶窗
10 错位横百叶窗
11 错位竖百叶窗
12 点扩散
13 左右到中间刷新
14 中间到左右刷新
15 中间到上下
16 上下到中间
17 右下到左上
18 右上到左下
19 左上到右下
20 左下到右上
21 横条
22 竖条
23
//网页是否被检索
//打印分页
//设置打印
<object id="factory" style="display:none" viewastext
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"
></object>
<input type=button value=页面设置 onclick="factory.printing.PageSetup()" >
<input type=button value=打印预览 onclick="factory.printing.Preview()" >
<script language=javascript>
function window.onload()
{
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.printing.SetPageRange(false , 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"
// -- basic features
factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页"
factory.printing.footer = "（自定义页脚）"
factory.printing.portrait = false
factory.printing.leftMargin = 0.75
factory.printing.topMargin = 1.5
factory.printing.rightMargin = 0.75
factory.printing.bottomMargin = 1.5
}
function Print(frame) {
factory.printing.Print(true , frame) // print with prompt
}
</script>
<input type=button value="打印本页" onclick="factory.printing.Print(false)" >
<input type=button value="页面设置" onclick="factory.printing.PageSetup()" >
<input type=button value="打印预览" onclick="factory.printing.Preview()" ><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a>
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"
></object>
<input type=button value=页面设置 onclick="factory.printing.PageSetup()" >
<input type=button value=打印预览 onclick="factory.printing.Preview()" >
<script language=javascript>
function window.onload()
{
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.printing.SetPageRange(false , 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"
// -- basic features
factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页"
factory.printing.footer = "（自定义页脚）"
factory.printing.portrait = false
factory.printing.leftMargin = 0.75
factory.printing.topMargin = 1.5
factory.printing.rightMargin = 0.75
factory.printing.bottomMargin = 1.5
}
function Print(frame) {
factory.printing.Print(true , frame) // print with prompt
}
</script>
<input type=button value="打印本页" onclick="factory.printing.Print(false)" >
<input type=button value="页面设置" onclick="factory.printing.PageSetup()" >
<input type=button value="打印预览" onclick="factory.printing.Preview()" ><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a>
//自带的打印预览
WebBrowser.ExecWB(1,1) 打开
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口
Web.ExecWB(4,1) 保存网页
Web.ExecWB(6,1) 打印
Web.ExecWB(7,1) 打印预览
Web.ExecWB(8,1) 打印页面设置
Web.ExecWB(10,1) 查看页面属性
Web.ExecWB(15,1) 好像是撤销，有待确认
Web.ExecWB(17,1) 全选
Web.ExecWB(22,1) 刷新
Web.ExecWB(45,1) 关闭窗体无提示
<style media=print>
.Noprint{display:none;}<!--用本样式在打印时隐藏非打印项目-->
.PageNext{page-break-after: always;}<!--控制分页-->
</style>
<object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2" >
</object>
<center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口
Web.ExecWB(4,1) 保存网页
Web.ExecWB(6,1) 打印
Web.ExecWB(7,1) 打印预览
Web.ExecWB(8,1) 打印页面设置
Web.ExecWB(10,1) 查看页面属性
Web.ExecWB(15,1) 好像是撤销，有待确认
Web.ExecWB(17,1) 全选
Web.ExecWB(22,1) 刷新
Web.ExecWB(45,1) 关闭窗体无提示
<style media=print>
.Noprint{display:none;}<!--用本样式在打印时隐藏非打印项目-->
.PageNext{page-break-after: always;}<!--控制分页-->
</style>
<object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2" >
</object>
<center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>
//去掉打印时的页眉页脚
<script language=
"JavaScript" >
var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root= "HKEY_CURRENT_USER" ;
HKEY_Path= "\\Software\\Microsoft\\Internet Explorer\\PageSetup\\" ;
//设置网页打印的页眉页脚为空
function PageSetup_Null()
{
try
{
var Wsh= new ActiveXObject ( "WScript.Shell" );
HKEY_Key= "header" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "" );
HKEY_Key= "footer" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "" );
}
catch (e){}
}
//设置网页打印的页眉页脚为默认值
function PageSetup_Default()
{
try
{
var Wsh= new ActiveXObject ( "WScript.Shell" );
HKEY_Key= "header" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&w&b页码,&p/&P" );
HKEY_Key= "footer" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&u&b&d" );
}
catch (e){}
}
</script>
<input type= "button" value= "清空页码" onclick=PageSetup_Null()>
<input type= "button" value= "恢复页码" onclick=PageSetup_Default()>
var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root= "HKEY_CURRENT_USER" ;
HKEY_Path= "\\Software\\Microsoft\\Internet Explorer\\PageSetup\\" ;
//设置网页打印的页眉页脚为空
function PageSetup_Null()
{
try
{
var Wsh= new ActiveXObject ( "WScript.Shell" );
HKEY_Key= "header" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "" );
HKEY_Key= "footer" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "" );
}
catch (e){}
}
//设置网页打印的页眉页脚为默认值
function PageSetup_Default()
{
try
{
var Wsh= new ActiveXObject ( "WScript.Shell" );
HKEY_Key= "header" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&w&b页码,&p/&P" );
HKEY_Key= "footer" ;
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&u&b&d" );
}
catch (e){}
}
</script>
<input type= "button" value= "清空页码" onclick=PageSetup_Null()>
<input type= "button" value= "恢复页码" onclick=PageSetup_Default()>
//浏览器验证
function checkBrowser()
{
this .ver=navigator.appVersion
this .dom=document.getElementById?1:0
this .ie6=( this .ver.indexOf( "MSIE 6" )>-1 && this .dom)?1:0;
this .ie5=( this .ver.indexOf( "MSIE 5" )>-1 && this .dom)?1:0;
this .ie4=(document.all && ! this .dom)?1:0;
this .ns5=( this .dom && parseInt( this .ver) >= 5) ?1:0;
this .ns4=(document.layers && ! this .dom)?1:0;
this .mac=( this .ver.indexOf('Mac') > -1) ?1:0;
this .ope=(navigator.userAgent.indexOf('Opera')>-1);
this .ie=( this .ie6 || this .ie5 || this .ie4)
this .ns=( this .ns4 || this .ns5)
this .bw=( this .ie6 || this .ie5 || this .ie4 || this .ns5 || this .ns4 || this .mac || this .ope)
this .nbw=(! this .bw)
return this ;
}
{
this .ver=navigator.appVersion
this .dom=document.getElementById?1:0
this .ie6=( this .ver.indexOf( "MSIE 6" )>-1 && this .dom)?1:0;
this .ie5=( this .ver.indexOf( "MSIE 5" )>-1 && this .dom)?1:0;
this .ie4=(document.all && ! this .dom)?1:0;
this .ns5=( this .dom && parseInt( this .ver) >= 5) ?1:0;
this .ns4=(document.layers && ! this .dom)?1:0;
this .mac=( this .ver.indexOf('Mac') > -1) ?1:0;
this .ope=(navigator.userAgent.indexOf('Opera')>-1);
this .ie=( this .ie6 || this .ie5 || this .ie4)
this .ns=( this .ns4 || this .ns5)
this .bw=( this .ie6 || this .ie5 || this .ie4 || this .ns5 || this .ns4 || this .mac || this .ope)
this .nbw=(! this .bw)
return this ;
}
//计算内容宽和高
<SCRIPT language=
"javascript" >
function test(obj)
{
var range = obj.createTextRange();
alert( "内容区宽度: " + range.boundingWidth
+ "px\r\n内容区高度: " + range.boundingHeight + "px" );
}
</SCRIPT>
<BODY>
<Textarea id= "txt" height= "150" >sdf</textarea><INPUT type= "button" value= "计算内容宽度" onClick= "test(txt)" >
</BODY>
function test(obj)
{
var range = obj.createTextRange();
alert( "内容区宽度: " + range.boundingWidth
+ "px\r\n内容区高度: " + range.boundingHeight + "px" );
}
</SCRIPT>
<BODY>
<Textarea id= "txt" height= "150" >sdf</textarea><INPUT type= "button" value= "计算内容宽度" onClick= "test(txt)" >
</BODY>
//无模式的提示框
function modelessAlert(Msg)
{
window.showModelessDialog( "javascript:alert(\"" +escape(Msg)+ "\");window.close();" , "" , "status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;" );
}
{
window.showModelessDialog( "javascript:alert(\"" +escape(Msg)+ "\");window.close();" , "" , "status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;" );
}
//屏蔽按键
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" >
<noscript><meta http-equiv="refresh" content="0;url=about:noscript" ></noscript>
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title>
</head>
<body>
<script language="Javascript" ><!--
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键
//Author: meizz(梅花雨) 2002-6-18
function document.oncontextmenu(){event.returnValue=false ;}//屏蔽鼠标右键
function window.onhelp(){return false } //屏蔽F1帮助
function document.onkeydown()
{
if ((window.event.altKey)&&
((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ←
(window.event.keyCode==39))) //屏蔽 Alt+ 方向键 →
{
alert("不准你使用ALT+方向键前进或后退网页！" );
event.returnValue=false ;
}
/* 注：这还不是真正地屏蔽 Alt+ 方向键，
因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放，
用鼠标点掉警告框，这种屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/
if ((event.keyCode==8) || //屏蔽退格删除键
(event.keyCode==116)|| //屏蔽 F5 刷新键
(event.ctrlKey && event.keyCode==82)){ //Ctrl + R
event.keyCode=0;
event.returnValue=false ;
}
if (event.keyCode==122){event.keyCode=0;event.returnValue=false ;} //屏蔽F11
if (event.ctrlKey && event.keyCode==78) event.returnValue=false ; //屏蔽 Ctrl+n
if (event.shiftKey && event.keyCode==121)event.returnValue=false ; //屏蔽 shift+F10
if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false ; //屏蔽 shift 加鼠标左键新开一网页
if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4
{
window.showModelessDialog("about:blank" ,"" ,"dialogWidth:1px;dialogheight:1px" );
return false ;
}
}
</script>
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" >
<noscript><meta http-equiv="refresh" content="0;url=about:noscript" ></noscript>
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title>
</head>
<body>
<script language="Javascript" ><!--
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键
//Author: meizz(梅花雨) 2002-6-18
function document.oncontextmenu(){event.returnValue=false ;}//屏蔽鼠标右键
function window.onhelp(){return false } //屏蔽F1帮助
function document.onkeydown()
{
if ((window.event.altKey)&&
((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ←
(window.event.keyCode==39))) //屏蔽 Alt+ 方向键 →
{
alert("不准你使用ALT+方向键前进或后退网页！" );
event.returnValue=false ;
}
/* 注：这还不是真正地屏蔽 Alt+ 方向键，
因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放，
用鼠标点掉警告框，这种屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/
if ((event.keyCode==8) || //屏蔽退格删除键
(event.keyCode==116)|| //屏蔽 F5 刷新键
(event.ctrlKey && event.keyCode==82)){ //Ctrl + R
event.keyCode=0;
event.returnValue=false ;
}
if (event.keyCode==122){event.keyCode=0;event.returnValue=false ;} //屏蔽F11
if (event.ctrlKey && event.keyCode==78) event.returnValue=false ; //屏蔽 Ctrl+n
if (event.shiftKey && event.keyCode==121)event.returnValue=false ; //屏蔽 shift+F10
if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false ; //屏蔽 shift 加鼠标左键新开一网页
if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4
{
window.showModelessDialog("about:blank" ,"" ,"dialogWidth:1px;dialogheight:1px" );
return false ;
}
}
</script>
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键
</body>
</html>
//屏蔽打印
<style>
@media print{
* {display:none}
}
</style>
//移动的图层，拖动
1.<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(
this ) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span>
<script language=javascript>
var Obj;
function MouseDown(obj)
{
Obj=obj;
Obj.setCapture();
Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop;
}
function MouseMove()
{
if (Obj!= null )
{
Obj.style.left = event.x-Obj.l;
Obj.style.top = event.y-Obj.t;
}
}
function MouseUp()
{
if (Obj!= null )
{
Obj.releaseCapture();
Obj= null ;
}
}
</script>
2.
<div id= "myDiv" src= "logo.gif" ondrag= "doDrag();" onmouseover= "this.style.cursor='hand'" style= "position:absolute;left=100;top=100;" onmousedown= "doMouseDown();" >
<a href= "#" onclick= "return false" ><h1>wlecome</h1></a>
</div>
<script language= "JavaScript" type= "text/javascript" >
var orgMouseX;
var orgMouseY;
var orgObjX;
var orgObjY;
function doDrag()
{
var myObject=document.all.myDiv;
var x=event.clientX;
var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY);
}
function doMouseDown()
{
orgMouseX=event.clientX;
orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top);
}
</script>
<script language=javascript>
var Obj;
function MouseDown(obj)
{
Obj=obj;
Obj.setCapture();
Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop;
}
function MouseMove()
{
if (Obj!= null )
{
Obj.style.left = event.x-Obj.l;
Obj.style.top = event.y-Obj.t;
}
}
function MouseUp()
{
if (Obj!= null )
{
Obj.releaseCapture();
Obj= null ;
}
}
</script>
2.
<div id= "myDiv" src= "logo.gif" ondrag= "doDrag();" onmouseover= "this.style.cursor='hand'" style= "position:absolute;left=100;top=100;" onmousedown= "doMouseDown();" >
<a href= "#" onclick= "return false" ><h1>wlecome</h1></a>
</div>
<script language= "JavaScript" type= "text/javascript" >
var orgMouseX;
var orgMouseY;
var orgObjX;
var orgObjY;
function doDrag()
{
var myObject=document.all.myDiv;
var x=event.clientX;
var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY);
}
function doMouseDown()
{
orgMouseX=event.clientX;
orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top);
}
</script>
//文档状态改变
<iframe src=
"a.html" id=
"f" name=
"f" scrolling=
"no" frameborder=0 marginwidth=0 marginheight=0></iframe>
<script>
var doc=window.frames[ "f" ].document;
function s(){
if (doc.readyState== "complete" ){
document.all.f.style.height=doc.body.scrollHeight
document.all.f.style.width=doc.body.scrollWidth
}
}
doc.onreadystatechange=s
</script>
<script>
var doc=window.frames[ "f" ].document;
function s(){
if (doc.readyState== "complete" ){
document.all.f.style.height=doc.body.scrollHeight
document.all.f.style.width=doc.body.scrollWidth
}
}
doc.onreadystatechange=s
</script>
//刷新后不变的文本框
//访问剪贴板
//操作COOKIE
function SetCookie(sName, sValue)
{
document.cookie = sName + "=" + escape(sValue) + "; " ;
}
function GetCookie(sName)
{
var aCookie = document.cookie.split( "; " );
for ( var i=0; i < aCookie.length; i++)
{
var aCrumb = aCookie[i].split( "=" );
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}
}
function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;" ;
}
{
document.cookie = sName + "=" + escape(sValue) + "; " ;
}
function GetCookie(sName)
{
var aCookie = document.cookie.split( "; " );
for ( var i=0; i < aCookie.length; i++)
{
var aCrumb = aCookie[i].split( "=" );
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}
}
function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;" ;
}
//setTimeout增加参数
<script>
var _st = window.setTimeout;
window.setTimeout = function (fRef, mDelay) {
if (typeof fRef == 'function '){
var argu = Array .prototype.slice.call(arguments,2);
var f = (function (){ fRef.apply(null , argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
window.setTimeout(test,1000,'fason');
</script>
var _st = window.setTimeout;
window.setTimeout = function (fRef, mDelay) {
if (typeof fRef == 'function '){
var argu = Array .prototype.slice.call(arguments,2);
var f = (function (){ fRef.apply(null , argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
window.setTimeout(test,1000,'fason');
</script>
//自定义的apply,call
Function.prototype.apply = function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this ;
var argus = new Array ();
for (var i=0;i<argu.length;i++)
argus[i] = "argu[" + i + "]" ;
var r;
eval("r = " + (obj ? ("obj._caller(" + argus.join("," ) + ");" ) : ("this(" + argus.join("," ) + ");" )));
return r;
};
Function.prototype.call = function (obj) {
var argu = new Array ();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments[i];
return this .apply(obj, argu);
};
if (obj) obj.constructor.prototype._caller = this ;
var argus = new Array ();
for (var i=0;i<argu.length;i++)
argus[i] = "argu[" + i + "]" ;
var r;
eval("r = " + (obj ? ("obj._caller(" + argus.join("," ) + ");" ) : ("this(" + argus.join("," ) + ");" )));
return r;
};
Function.prototype.call = function (obj) {
var argu = new Array ();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments[i];
return this .apply(obj, argu);
};
//下载文件
function
DownURL(strRemoteURL,strLocalURL)
{
try
{
var xmlHTTP=new ActiveXObject ("Microsoft.XMLHTTP" );
xmlHTTP.open("Get" ,strRemoteURL,false );
xmlHTTP.send();
var adodbStream=new ActiveXObject ("ADODB.Stream" );
adodbStream.Type=1;//1=adTypeBinary
adodbStream.Open();
adodbStream.write(xmlHTTP.responseBody);
adodbStream.SaveToFile(strLocalURL,2);
adodbStream.Close();
adodbStream=null ;
xmlHTTP=null ;
}
catch (e)
{
window.confirm("下载URL出错!" );
}
//window.confirm("下载完成." );
}
{
try
{
var xmlHTTP=new ActiveXObject ("Microsoft.XMLHTTP" );
xmlHTTP.open("Get" ,strRemoteURL,false );
xmlHTTP.send();
var adodbStream=new ActiveXObject ("ADODB.Stream" );
adodbStream.Type=1;//1=adTypeBinary
adodbStream.Open();
adodbStream.write(xmlHTTP.responseBody);
adodbStream.SaveToFile(strLocalURL,2);
adodbStream.Close();
adodbStream=null ;
xmlHTTP=null ;
}
catch (e)
{
window.confirm("下载URL出错!" );
}
//window.confirm("下载完成." );
}
//检验连接是否有效
//组件是否安装
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))
//检查网页是否存在
function CheckURL(URL)
{
var xmlhttp = new ActiveXObject ( "Microsoft.XMLHTTP" );
xmlhttp.Open( "GET" ,URL, false );
try
{
xmlhttp.Send();
var result = xmlhttp.status;
}
catch (e) { return ( false ); }
if (result==200)
{
return true ;
}
xmlhttp = null ;
return false ;
}
{
var xmlhttp = new ActiveXObject ( "Microsoft.XMLHTTP" );
xmlhttp.Open( "GET" ,URL, false );
try
{
xmlhttp.Send();
var result = xmlhttp.status;
}
catch (e) { return ( false ); }
if (result==200)
{
return true ;
}
xmlhttp = null ;
return false ;
}
//连接数据库
<script language=
"javascript" >
//用 JavaScript 写服务器端连接数据库的代码示例
var conn = new ActiveXObject ( "ADODB.Connection" );
conn.Open( "Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
+ "Password=; Initial Catalog=pubs" );
var rs = new ActiveXObject ( "ADODB.Recordset" );
var sql= "select * from authors" ;
rs.open(sql, conn);
shtml = "<table width='100%' border=1>" ;
shtml += "<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>" ;
while (!rs.EOF)
{
shtml += "<tr><td>" + rs( "au_id" ) + "</td><td>" + rs( "au_lname" ) + "</td><td>" + rs( "au_fname" ) + "</td><td>" + rs( "phone" ) + "</td><td>" + rs( "address" ) + "</td><td>" + rs( "city" ) + "</td><td>" + rs( "state" ) + "</td><td>" + rs( "zip" ) + "</td></tr>" ;
rs.moveNext;
}
shtml += "</table>" ;
document.write(shtml);
rs.close();
rs = null ;
conn.close();
conn = null ;
</script>
//用 JavaScript 写服务器端连接数据库的代码示例
var conn = new ActiveXObject ( "ADODB.Connection" );
conn.Open( "Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
+ "Password=; Initial Catalog=pubs" );
var rs = new ActiveXObject ( "ADODB.Recordset" );
var sql= "select * from authors" ;
rs.open(sql, conn);
shtml = "<table width='100%' border=1>" ;
shtml += "<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>" ;
while (!rs.EOF)
{
shtml += "<tr><td>" + rs( "au_id" ) + "</td><td>" + rs( "au_lname" ) + "</td><td>" + rs( "au_fname" ) + "</td><td>" + rs( "phone" ) + "</td><td>" + rs( "address" ) + "</td><td>" + rs( "city" ) + "</td><td>" + rs( "state" ) + "</td><td>" + rs( "zip" ) + "</td></tr>" ;
rs.moveNext;
}
shtml += "</table>" ;
document.write(shtml);
rs.close();
rs = null ;
conn.close();
conn = null ;
</script>