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 实用的javascript代码大全  发贴心情 Post By：2008-11-3 17:24:19 [只看该作者]

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" >
<input id="prev" TYPE=button value="<上一条记录" >  
<input id="next" TYPE=button value="下一条记录>" >  
<input id="last" TYPE=button value="最后一条记录>>" >   
<input id="Add" TYPE=button value="添加新记录" >  

<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);
  alert(s.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;" >
                <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。   请试着输入页面中的关键字再次查找！");
  }
}
return false;
}

 


//操作EXECL

<script language="javascript">
function jStartExcel() ...{
var xls = new ActiveXObject ( "Excel.Application" );
xls.visible = true;
var newBook = xls.Workbooks.Add;
newBook.Worksheets.Add;
newBook.Worksheets(1).Activate;
xls.ActiveWorkBook.ActiveSheet.PageSetup.Orientation = 2;
xls.ActiveWorkBook.ActiveSheet.PageSetup.PaperSize = 5;
newBook.Worksheets(1).Columns("A").columnwidth=50;
newBook.Worksheets(1).Columns("A").WrapText = true;
newBook.Worksheets(1).Columns("B").columnwidth=50;
newBook.Worksheets(1).Columns("B").WrapText = true;
newBook.Worksheets(1).Range("A1:B1000").NumberFormat = "0";
newBook.Worksheets(1).Range("A1:B1000").HorizontalAlignment = -4131;
newBook.Worksheets(1).Cells(1,1).Interior.ColorIndex="15";
newBook.Worksheets(1).Cells(1,1).value="First Column, First Cell";
newBook.Worksheets(1).Cells(2,1).value="First Column, Second Cell";
newBook.Worksheets(1).Cells(1,2).value="Second Column, First Cell";
newBook.Worksheets(1).Cells(2,2).value="Second Column, Second Cell";
newBook.Worksheets(1).Name="My First WorkSheet";
}
</script>


//自定义提示条

<a href="#" title="这是提示">tip</a>
<script Language="JavaScript">
//***********默认设置定义.*********************
tPopWait=50;//停留tWait豪秒后显示提示。
tPopShow=5000;//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=99;
//***************内部变量定义*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;
document.write("<style type=''text/css''id=''defaultPopStyle''>");
document.write(".cPopText {  background-color: #F8F8F5;color:#000000; border: 1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id=''dypopLayer'' style=''position:absolute;z-index:1000;'' class=''cPopText''></div>");

function showPopupText()...{
var o=event.srcElement;
MouseX=event.x;
MouseY=event.y;
if(o.alt!=null && o.alt!="")...{o.dypop=o.alt;o.alt=""};
        if(o.title!=null && o.title!="")...{o.dypop=o.title;o.title=""};
if(o.dypop!=sPop) ...{
sPop=o.dypop;
clearTimeout(curShow);
clearTimeout(tFadeOut);
clearTimeout(tFadeIn);
clearTimeout(tFadeWaiting);
if(sPop==null || sPop=="") ...{
dypopLayer.innerHTML="";
dypopLayer.style.filter="Alpha()";
dypopLayer.filters.Alpha.opacity=0;
}
else ...{
if(o.dyclass!=null) popStyle=o.dyclass 
else popStyle="cPopText";
curShow=setTimeout("showIt()",tPopWait);
}
}
}
function showIt()...{
dypopLayer.className=popStyle;
dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth;
popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
else popLeftAdjust=0;
if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
else popTopAdjust=0;
dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
dypopLayer.style.filter="Alpha(Opacity=0)";
fadeOut();
}
function fadeOut()...{
if(dypopLayer.filters.Alpha.opacity<popOpacity) ...{
dypopLayer.filters.Alpha.opacity+=showPopStep;
tFadeOut=setTimeout("fadeOut()",1);
}
else ...{
dypopLayer.filters.Alpha.opacity=popOpacity;
tFadeWaiting=setTimeout("fadeIn()",tPopShow);
}
}
function fadeIn()...{
if(dypopLayer.filters.Alpha.opacity>0) ...{
dypopLayer.filters.Alpha.opacity-=1;
tFadeIn=setTimeout("fadeIn()",1);
}
}
document.onmouseover=showPopupText;
</script>


//插入文字

document.onclick =function()...{ 
var oSource = window.event.srcElement; 
if(oSource.tagName!="DIV") 
return false; 
var sel = document.selection; 
if (sel!=null) ...{ 
var rng = sel.createRange(); 
if (rng!=null) 
rng.pasteHTML("<font color=red>插入文字</font>"); 
} 
} 

 

//netscapte下操作xml

doc = new ActiveXObject("Msxml2.DOMDocument");
doc = new ActiveXObject("Microsoft.XMLDOM")
->>
doc = (new DOMParser()).parseFromString(sXML,''text/xml'')


//禁止FSO

1.注销组件
regsvr32 /u scrrun.dll
2.修改PROGID 
HKEY_CLASSES_ROOTScripting.FileSystemObject
Scripting.FileSystemObject
3.对于使用object的用户，修改HKEY_CLASSES_ROOTScripting.


//省略号

<DIV STYLE="width: 120px; height: 50px; border: 1px solid blue;
            overflow: hidden; text-overflow:ellipsis">
<NOBR>就是比如有一行文字，很长，表格内一行显示不下.</NOBR>
</DIV>


//判断键值

<html>
<meta http-equiv="Content-Type" c>
<head>
<script language="javascript">
var ie  =navigator.appName=="Microsoft Internet Explorer"?true:false;
  
function keyDown(e)
...{
if(!ie)
...{
  var nkey=e.which;
  var iekey=''现在是ns浏览器'';
  var realkey=String.fromCharCode(e.which);
}
if(ie)
...{
  var iekey=event.keyCode;
  var nkey=''现在是ie浏览器'';
  var realkey=String.fromCharCode(event.keyCode);
  if(event.keyCode==32)...{realkey='''' 空格''''}
  if(event.keyCode==13)...{realkey='''' 回车''''}
  if(event.keyCode==27)...{realkey='''' Esc''''}
  if(event.keyCode==16)...{realkey='''' Shift''''}
  if(event.keyCode==17)...{realkey='''' Ctrl''''}
  if(event.keyCode==18)...{realkey='''' Alt''''}
}
alert(''ns浏览器中键值:''+nkey+'' ''+''ie浏览器中键值:''+iekey+'' ''+''实际键为''+realkey);
}
document.onkeydown = keyDown;
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>请按任意一个键。。。。</h3>
</center>
</body>
</html>

 

//检测media play版本

<IE:clientCaps ID="oClientCaps" style="{behavior:url(#default#clientcaps)}" />
<SCRIPT>
var flash="";
    WMPVersion= oClientCaps.getComponentVersion("{22D6F312-B0F6-11D0-94AB-0080C74C7E95}","ComponentID"); 
    if (WMPVersion != "") ...{
    flash = "";
    var version = WMPVersion.split(",");
    var i;
    for (i = 0; i < version.length; i++) ...{
      if (i != 0)
    flash += ".";
      flash += version;
    }
     document.write("您的Windows Media Player 版本是:"+flash+"<p>");
  }
</SCRIPT>

 

//图象按比例

<script language="JavaScript">
<!--
//图片按比例缩放
var flag=false;
function DrawImage(ImgD)...{
var image=new Image();
var iwidth = 80;  //定义允许图片宽度
var iheight = 80;  //定义允许图片高度
image.src=ImgD.src;
if(image.width>0 && image.height>0)...{
flag=true;
if(image.width/image.height>= iwidth/iheight)...{
  if(image.width>iwidth)...{  
  ImgD.width=iwidth;
  ImgD.height=(image.height*iwidth)/image.width;
  }else...{
  ImgD.width=image.width;  
  ImgD.height=image.height;
  }
  ImgD.alt=image.width+"×"+image.height;
  }
else...{
  if(image.height>iheight)...{  
  ImgD.height=iheight;
  ImgD.width=(image.width*iheight)/image.height;  
  }else...{
  ImgD.width=image.width;  
  ImgD.height=image.height;
  }
  ImgD.alt=image.width+"×"+image.height;
  }
}
} 
//-->
</script>
<img src=".." >



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