//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>

//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;");
}

//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>

//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>
  

//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>

//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;";
}

//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>


//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);
};        


//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.");
}


//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;
}

//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>

//使用数据岛

<html>
<body>
srno:<input type=text datasrc=#xmldate DataFLD=srno size="76"><BR>
times:<input type=text datasrc=#xmldate DataFLD=times size="76"><BR>
<input id="first" TYPE=button value="<< 第一条记录" onclick="xmldate.recordset.moveFirst()">
<input id="prev" TYPE=button value="<上一条记录" onclick="xmldate.recordset.movePrevious()">   
<input id="next" TYPE=button value="下一条记录>" onclick="xmldate.recordset.moveNext()">   
<input id="last" TYPE=button value="最后一条记录>>" onclick="xmldate.recordset.moveLast()">    
<input id="Add" TYPE=button value="添加新记录" onclick="xmldate.recordset.addNew()">   

<XML ID="xmldate">
<infolist>
<info ><srno>20041025-01</srno><times>null</times></info>
<info ><srno>20041101-09</srno><times>2004年10月1日2点22分0秒</times></info>
</infolist>
</XML>
</body>
</html>

//获得参数

<body>
<a href="javascript:location.href=location.href + '?a=1&b=2'">search</a>
<script language="JavaScript">
<!--
var a = location.search.substr(1);
if(a.length>0)
{
var re = /([^&]*?)\=([^&]*)/g
var s = a.match(re);
for(var i= 0;i<s.length;i++)
{
   alert(s[i]);
   alert(s[i].split("=")[1]);
}
}
//-->
</script>
</body>

//可编辑SELECT

<input type=text name=re_name style="width:100px;height:21px;font-size:10pt;"><span style="width:18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;width:118px; background-color:#FFEEEE;" onChange="document.all.re_name.value=this.value;">
                 <option value="1">11111111<option>
                 <option value="2">222222</option>
                 <option value="3">333333</option>
               </select>
               </span>

//设置光标位置

function getCaret(textbox)
{
var control = document.activeElement;
textbox.focus();
var rang = document.selection.createRange();
   rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus();
return rang.text.length;
}
function setCaret(textbox,pos)
{
try
{
  var r =textbox.createTextRange();
    r.moveStart('character',pos);
    r.collapse(true);
    r.select();
}
catch(e)
{}
}
function selectLength(textbox,start,len)
{
try
{
  var r =textbox.createTextRange();
  
   r.moveEnd('character',len-(textbox.value.length-start));
   r.moveStart('character',start);
   
   r.select();
}
catch(e)
{//alert(e.description)}
}
function insertAtCaret(textbox,text)
{
textbox.focus();
document.selection.createRange().text = text;
}


//页内查找

function findInPage(str)
{
var txt, i, found,n = 0;
if (str == "")
{
  return false;
}
txt = document.body.createTextRange();
for (i = 0; i <= n && (found = txt.findText(str)) != false; i++)
{
   txt.moveStart("character", 1);
   txt.moveEnd("textedit");
}
if (found)
{
   txt.moveStart("character", -1);
   txt.findText(str);
   txt.select();
   txt.scrollIntoView();
   n++;   
}
else
{
  if (n > 0)
   {
    n = 0;
    findInPage(str);
   }
   else
   {
    alert(str + "...             您要找的文字不存在。\n \n请试着输入页面中的关键字再次查找!");
   }
}
return false;
}


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