JavaScript高级应用(二)，转

2024-04-07 18:47•javascript•阅读 3392

1.组件是否安装

//组件是否安装

isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))

2.检查网页是否存在

//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; 
}

3.连接数据库

//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  
    +"Password=; Initial Catalog=pubs"); 
  var rs = new ActiveXObject("ADODB.Recordset"); 
  var sql="select * from authors"; 
  rs.open(sql, conn); 
shtml = "<table width='100%' ; 
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>

4.使用数据岛

//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 > 
<input >   
<input >   
<input >    
<input >  

<XML > 
<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>

5.获取参数

//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>

6.操作EXECL

//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>

7.自定义提示条

//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'>"); 
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   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 pop; 
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>

8.判断键值

<html> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<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+'\n'+'ie浏览器中键值:'+iekey+'\n'+'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>

9.取得innerText

<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
var xmlDoc = new ActiveXObject("Msxml2.DOMDocument.4.0"); 
var currNode; 
xmlDoc.async = false; 
xmlDoc.async = false; 
xmlDoc.loadXML("<TABLENAME>      你好你阿三    大法     司法等四              </TABLENAME>"); 
currNode = xmlDoc.documentElement; 
    
  var s = currNode.xml; 
  var r = /\<([^\>\s]*?)[^\>]*?\>([^\<]*?)\<\/\1\>/ 
  var b = s.replace(r,"$2"); 
  alert(b); 
//--> 
</SCRIPT>

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