javascript代码大全之四 .: WEB开发技术知识库(www.cn-web.com)

//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 <HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.sHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=sHistory type=text id=oPersistInput>
</BODY>
</HTML>

//访问剪贴板

event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL")
(2)普通访问
window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");

//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.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 = "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;
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

function getXML(URL)
{
var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
xmlhttp.Open("GET",URL, false);
try
{
  xmlhttp.Send();
}
catch(e){}
finally
{
  var result = xmlhttp.responseText;
  if(result)
  {
if(xmlhttp.Status==200)
{
return(true);
}
else
{
return(false);
}
  }
  else
  {
return(false);
  }
}
}

//POST代替FORM

<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
strReturn = ""
For i = 1 To Len(vstrIn)
      ThisChr = Mid(vStrIn,i,1)
      If Abs(Asc(ThisChr)) < &HFF Then
         strReturn = strReturn & ThisChr
      Else
         innerCode = Asc(ThisChr)
         If innerCode < 0 Then
            innerCode = innerCode + &H10000
         End If
         Hight8 = (innerCode  And &HFF00) &HFF
         Low8 = innerCode And &HFF
         strReturn = strReturn & "%" & Hex(Hight8) &  "%" & Hex(Low8)
      End If
Next
URLEncoding = strReturn
End Function
Function bytes2BSTR(vIn)
strReturn = ""
For i = 1 To LenB(vIn)
      ThisCharCode = AscB(MidB(vIn,i,1))
      If ThisCharCode < &H80 Then
         strReturn = strReturn & Chr(ThisCharCode)
      Else
         NextCharCode = AscB(MidB(vIn,i+1,1))
         strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
         i = i + 1
      End If
Next
bytes2BSTR = strReturn
End Function
dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
msgbox bytes2BSTR(oReq.responseBody)
</SCRIPT>

//readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成

javascript代码大全之四

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