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javascript 小技巧 | |
作者:未知 文章来源:网络文摘 点击数 更新时间:2007/1/1 14:36:25 文章录入:admin 责任编辑:admin | |
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//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>
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); };
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."); } //POST代替FORM
//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 //组件是否安装 //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 //获得参数
//可编辑SELECT
//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; }
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 //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>
<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
//判断键值
//禁止FSO 1.注销组件
regsvr32 /u scrrun.dll 2.修改PROGID HKEY_CLASSES_ROOT\Scripting.FileSystemObject Scripting.FileSystemObject 3.对于使用object的用户,修改HKEY_CLASSES_ROOT\Scripting.
//检测media play版本 //图象按比例 //细线SELECT function getComputerName()
{ var objWMIService = GetObject("Winmgmts:root\cimv2"); for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext()) { var getComputer = e.item(); return getComputer.Name; } }
<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> //mergeAttributes 复制所有读/写标签属性到指定元素。 <SCRIPT>
function fnMerge(){ oSource.children[1].mergeAttributes(oSource.children[0]); } </SCRIPT> <SPAN ID=oSource> <DIV ID="oDiv" ATTRIBUTE1="true" ATTRIBUTE2="true" onclick="alert('click');" onmouseover="this.style.color='#0000FF';" onmouseout="this.style.color='#000000';" > This is a sample <B>DIV</B> element. </DIV> <DIV ID="oDiv2"> This is another sample <B>DIV</B> element. </DIV> </SPAN> <INPUT TYPE="button" VALUE="Merge Attributes" onclick="fnMerge()" > |
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