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常用的JavaScript代码

作者:admin 来源:原创 日期:2009-11-20 20:18:41 人气: 标签:
导读:禁止鼠标右键、禁止选取复制粘贴;TEXTAREA自适应文字行数的多少;屏蔽Alt+F4;调用客户端的程序;TEXTAREA自适应文字行数的多少;怎么判断是否是字符;判断上一页的来

1.禁止鼠标右键、禁止选取、复制、粘贴
<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()>

2.禁止鼠标右键oncontextmenu="return false"

3.禁止粘贴onpaste="return false"

4.oncopy="return false;" oncut="return false;" 防止复制

5.<link rel="Shortcut Icon" href="favicon.ico"> IE地址栏前换成自己的图标

6.<link rel="Bookmark" href="favicon.ico"> 可以在收藏夹中显示出你的图标

7.<input style="ime-mode:disabled"> 关闭输入法

8.永远都会带着框架
<script language="javascript">
if (window == top)top.location.href = "frames.htm"; //frames.htm为框架网页
</script>

9.防止被人frame
<SCRIPT LANGUAGE=javascript>
if (top.location != self.location)top.location=self.location;
</SCRIPT>

10.<noscript><iframe src=*.html></iframe></noscript> 网页将不能被另存为

11.<input type=button value=查看网页源代码
onclick="window.location = 'view-source:'+ 'http://www.csdn.net/'">

12.一段JavaScript的关机代码
win98/me
<script language="JavaScript">
var wsh = new ActiveXObject("WScript.Shell");
wsh.Run("rundll32.exe user.exe,exitWindows");
</script>

win2000 or xp
<script language="JavaScript">
var wsh = new ActiveXObject("WScript.Shell");
wsh.sendKeys("^{ESC}");
wsh.sendKeys("{UP}~S~");
</script>

13.取得控件的绝对位置
<script language="Javascript">
function getIE(e){
var t=e.offsetTop;
var l=e.offsetLeft;
while(e=e.offsetParent){
t+=e.offsetTop;
l+=e.offsetLeft;
}
alert("top="+t+"\nleft="+l);
}
</script>

//VBScript
<script language="VBScript"><!--
function getIE()
dim t,l,a,b
set a=document.all.img1
t=document.all.img1.offsetTop
l=document.all.img1.offsetLeft
while a.tagName<>"BODY"
set a = a.offsetParent
t=t+a.offsetTop
l=l+a.offsetLeft
wend
msgbox "top="&t&chr(13)&"left="&l,64,"得到控件的位置"
end function
-->
</script>

14.光标是停在文本框文字的最后
<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()">

15.调用客户端的程序
<script>
var wsh=new ActiveXObject("wscript.shell")
wsh.run("notepad.exe")
</script>

16.最小化、最大化、关闭窗口
<object id=hh1 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Minimize"></object>
<object id=hh2 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<OBJECT id=hh3 classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11">
<PARAM NAME="Command" VALUE="Close"></OBJECT>

<input type=button value=最小化 onclick=hh1.Click()>
<input type=button value=最大化 onclick=hh2.Click()>
<input type=button value=关闭 onclick=hh3.Click()>
本例适用于IE

17.屏蔽 Alt+F4
<script language=Javascript>
function document.onkeydown()
{
if ((window.event.altKey)&&(window.event.keyCode==115)){
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;}
}
</script>

18.自己动手为string添加Trim
<script language=Javascript>
String.prototype.Trim=function(){return this.replace(/(^\s*)|(\s*$)/g,"");}
String.prototype.Ltrim = function(){return this.replace(/(^\s*)/g, "");}
String.prototype.Rtrim = function(){return this.replace(/(\s*$)/g, "");}
var str = " abc de ";
alert(str.Trim());
</script>

19.检查一段字符串是否全由数字组成
<script language="Javascript"><!--
function checkNum(str){return str.match(/\D/)==null}
alert(checkNum("1232142141"))
alert(checkNum("123214214a1"))
// --></script>

20.获得一个窗口的大小
document.body.clientWidth,document.body.clientHeight

21.怎么判断是否是字符
if (/[^\x00-\xff]/g.test(s)) alert("含有汉字");
else alert("全是字符");

22.TEXTAREA自适应文字行数的多少
<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight">
</textarea>

23.日期减去天数等于第二个日期
<script language=Javascript>
function cc(dd,dadd)
{
//可以加上错误处理
var a = new Date(dd)
a = a.valueOf()
a = a - dadd * 24 * 60 * 60 * 1000
a = new Date(a)
alert(a.getFullYear() + "年" + (a.getMonth() + 1) + "月" + a.getDate() + "日")
}
cc("12/23/2002",2)
</script>

24.选择了哪一个Radio
<HTML><script language="vbscript">
function checkme()
for each ob in radio1
if ob.checked then window.alert ob.value
next
end function
</script><BODY>
<INPUT name="radio1" type="radio" value="style" checked>Style
<INPUT name="radio1" type="radio" value="barcode">Barcode
<INPUT type="button" value="check" onclick="checkme()">
</BODY></HTML>

25.判断上一页的来源
asp:
request.servervariables("HTTP_REFERER")

javascript:
document.referrer

26.
本机ip<%=request.servervariables("remote_addr")%>
服务器名<%=Request.ServerVariables("SERVER_NAME")%>
服务器IP<%=Request.ServerVariables("LOCAL_ADDR")%>
服务器端口<%=Request.ServerVariables("SERVER_PORT")%>
服务器时间<%=now%>
IIS版本<%=Request.ServerVariables"SERVER_SOFTWARE")%>
脚本超时时间<%=Server.ScriptTimeout%>
本文件路径<%=server.mappath(Request.ServerVariables("SCRIPT_NAME"))%>
服务器CPU数量<%=Request.ServerVariables("NUMBER_OF_PROCESSORS")%>
服务器解译引擎<%=ScriptEngine & "/"& ScriptEngineMajorVersion

&"."&ScriptEngineMinorVersion&"."& ScriptEngineBuildVersion %>
服务器操作系统<%=Request.ServerVariables("OS")%>

27.ENTER键可以让光标移到下一个输入框
<input onkeydown="if(event.keyCode==13)event.keyCode=9">

28.怎样通过asp的手段来检查来访者是否用了代理
<% if Request.ServerVariables("HTTP_X_FORWARDED_FOR")<>"" then
response.write "<font color=#FF0000>您通过了代理服务器,"& _
"真实的IP为"&Request.ServerVariables("HTTP_X_FORWARDED_FOR")
end if%>

29.各种样式的光标
auto :标准光标
default :标准箭头
hand :手形光标
wait :等待光标
text :I形光标
vertical-text :水平I形光标
no-drop :不可拖动光标
not-allowed :无效光标
help :?帮助光标
all-scroll :三角方向标
move :移动标
crosshair :十字标

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