JS实用

js转载
2008-07- 17 10:33
//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>2004 1025-0 1</srno><times> null</times></info>
<info ><srno>2004 1 10 1-09</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"> 1 1 1 1 1 1 1 1<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;
}

//书

< 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 = -4 13 1;
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>

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