玻璃杯中的花生壳--JS技巧1

[java]JS技巧1　

[ 2007/2/13 11:25:51 | By: 玻璃杯中的花生壳 ]

JS技巧1 2007-02-09 11:24 Event 事件事件源对象event.srcElement.tagNameevent.srcElement.type捕获释放event.srcElement.setCapture();event.srcElement.releaseCapture();事件按键event.keyCodeevent.shiftKeyevent.altKeyevent.ctrlKey事件返回值event.returnValue鼠标位置event.xevent.y document 对象窗体活动元素document.activeElement绑定事件document.captureEvents(Event.KEYDOWN);访问窗体元素document.all("txt").focus();document.all("txt").select();窗体命令document.execCommand窗体COOKIEdocument.cookie菜单事件document.oncontextmenu创建元素document.createElement("SPAN");根据鼠标获得元素document.elementFromPoint(event.x,event.y).tagName=="TD"document.elementFromPoint(event.x,event.y).appendChild(ms)窗体图片document.images[索引]窗体事件绑定document.onmousedown=scrollwindow;元素document.窗体.elements[索引]对象绑定事件document.all.xxx.detachEvent('onclick',a);HTML标签document.documentElement.innerHTML第一个style标签document.styleSheets[0]style标签里的第一个样式document.styleSheets[0].rules[0]获取选中内容document.selection.createRange().duplicate().text 插件数目navigator.plugins取变量类型typeof($js_libpath) == "undefined"下拉框下拉框.options[索引]下拉框.options.length查找对象document.getElementsByName("r1");document.getElementById(id);定时timer=setInterval('scrollwindow()',delay);clearInterval(timer);UNCODE编码escape(),unescape父对象obj.parentElement(dhtml)obj.parentNode(dom)交换表的行TableID.moveRow(2,1)替换CSSdocument.all.csss.href = "a.css";并排显示display:inline隐藏焦点hidefocus=true根据宽度换行style="word-break:break-all"让英文字符串超出表格宽度自动换行word-wrap: break-word; word-break: break-all;框架透明背景<iframe src="1.htm" width=300 height=180 allowtransparency></iframe>获得style内容obj.style.cssText 自动刷新<meta HTTP-EQUIV="refresh" CONTENT="8;URL=http://www.playes.net">简单邮件<a href="mailto:aaa@bbb.com?subject=ccc&body=xxxyyy">MailMe</a>快速转到位置obj.scrollIntoView(true)锚<a name="first"><a href="#first">anchors</a>网页传递参数location.search();可编辑obj.contenteditable=true执行菜单命令obj.execCommand双字节字符/[^\x00-\xff]/汉字/[\u4e00-\u9fa5]/防止点击空链接时，页面往往重置到页首端<a href="javascript :function()">word</a> 上一网页源asp:request.servervariables("HTTP_REFERER")javascript :document.referrer释放内存CollectGarbage();禁止右键document.oncontextmenu = function() { return false;}禁止保存<noscript><iframe src="*.htm"></iframe></noscript>禁止选取<body oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false"onmouseup="document.selection.empty()>禁止粘贴<input type=text onpaste="return false">地址栏图标<link rel="Shortcut Icon" href="favicon.ico">favicon.ico 名字最好不变16*16的16色,放虚拟目录根目录下收藏栏图标<link rel="Bookmark" href="favicon.ico">查看源码<input type="button" value="查看网页源代码" onclick="window.location = 'view-source:'+'http://www.csdn.net/'">关闭输入法<input style="ime-mode:disabled">自动全选<input type=text name=text1 value="123" onfocus="this.select()">ENTER键可以让光标移到下一个输入框<input onkeydown="if(event.keyCode==13)event.keyCode=9">文本框的默认值<input type=text value="123" onfocus="alert(this.defaultValue)">checkbox扁平<input type=checkbox style="position: absolute; clip:rect(5px 15px 15px 5px)"><br>自动完成功能<input type=text autocomplete=on>打开该功能<input type=text autocomplete=off>关闭该功能 title换行obj.title = "123&#13sdfs&#32"获得时间所代表的微秒var n1 = new Date("2004-10-10".replace(/-/g, "\/")).getTime()窗口是否关闭win.closed窗口最大化<body onload="window.resizeTo(window.screen.width - 4,window.screen.height-50);window.moveTo(-4,-4)">无关闭按钮IEwindow.open("aa.htm", "meizz", "fullscreen=7");统一编码/解码alert(decodeURIComponent(encodeURIComponent("http://www.baidu.com/s?wd=阿飞")))encodeURIComponent对":"、"/"、";" 和 "?"也编码表格行指示<tr onmouseover="this.bgColor='#f0f0f0'" onmouseout="this.bgColor='#ffffff'"> 各种尺寸 s += "\r\n网页可见区域宽："+ document.body.clientWidth;s += "\r\n网页可见区域高："+ document.body.clientHeight;s += "\r\n网页可见区域高："+ document.body.offsetWeight +" (包括边线的宽)";s += "\r\n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";s += "\r\n网页正文全文宽："+ document.body.scrollWidth;s += "\r\n网页正文全文高："+ document.body.scrollHeight;s += "\r\n网页被卷去的高："+ document.body.scrollTop;s += "\r\n网页被卷去的左："+ document.body.scrollLeft;s += "\r\n网页正文部分上："+ window.screenTop;s += "\r\n网页正文部分左："+ window.screenLeft;s += "\r\n屏幕分辨率的高："+ window.screen.height;s += "\r\n屏幕分辨率的宽："+ window.screen.width;s += "\r\n屏幕可用工作区高度："+ window.screen.availHeight;s += "\r\n屏幕可用工作区宽度："+ window.screen.availWidth; 过滤数字 <input type=text onkeypress="return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false"> 特殊用途 <input type=button value=导入收藏夹 onclick="window.external.ImportExportFavorites(true,'http://www.google.com/');"><input type=button value=导出收藏夹 onclick="window.external.ImportExportFavorites(false,'http://www.google.com/');"><input type=button value=整理收藏夹 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)"><input type=button value=语言设置 onclick="window.external.ShowBrowserUI('LanguageDialog', null)"><input type=button value=加入收藏夹 onclick="window.external.AddFavorite('http://www.google.com/', 'google')"><input type=button value=加入到频道 onclick="window.external.addChannel('http://www.google.com/')"><input type=button value=加入到频道 onclick="window.external.showBrowserUI('PrivacySettings',null)"> 不缓存 <META HTTP-EQUIV="pragma" CONTENT="no-cache"><META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"><META HTTP-EQUIV="expires" CONTENT="0"> 正则匹配匹配中文字符的正则表达式： [\u4e00-\u9fa5]匹配双字节字符(包括汉字在内)：[^\x00-\xff]匹配空行的正则表达式：\n[\s| ]*\r匹配HTML标记的正则表达式：/<(.*)>.*<\/\1>|<(.*) \/>/匹配首尾空格的正则表达式：(^\s*)|(\s*$)（像vbscript那样的trim函数）匹配Email地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*匹配网址URL的正则表达式：http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)? 以下是例子：利用正则表达式限制网页表单里的文本框输入内容：用正则表达式限制只能输入中文：onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"1.用正则表达式限制只能输入全角字符： onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"2.用正则表达式限制只能输入数字：onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"3.用正则表达式限制只能输入数字和英文：onkeyup="value=value.replace(/[\W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" 消除图像工具栏 <IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false">or<head><meta http-equiv="imagetoolbar" content="no"></head> 无提示关闭 function Close(){ var ua=navigator.userAgent var ie=navigator.appName=="Microsoft Internet Explorer"?true:false if(ie) { var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE ")))) if(IEversion< 5.5) { var str = '<object id=noTipClose classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">' str += '<param name="Command" value="Close"></object>'; document.body.insertAdjacentHTML("beforeEnd", str); document.all.noTipClose.Click(); } else { window.opener =null; window.close(); } } else { window.close() }} 取得控件得绝对位置 <script language="javascript">function getoffset(e){ var t=e.offsetTop; var l=e.offsetLeft; while(e=e.offsetParent) { t+=e.offsetTop; l+=e.offsetLeft; } var rec = new Array(1); rec[0] = t; rec[1] = l; return rec}</script> 最小化,最大化,关闭 <object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"><param name="Command" value="Minimize"></object><object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"><param name="Command" value="Maximize"></object><OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"><PARAM NAME="Command" value="Close"></OBJECT><input type=button value=最小化 onclick=min.Click()><input type=button value=最大化 onclick=max.Click()><input type=button value=关闭 onclick=close.Click()> 光标停在文字最后 <script language="javascript">function cc(){ var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse(true); r.select();}</script><input type=text name=text1 value="123" onfocus="cc()"> 页面进入和退出的特效进入页面<meta http-equiv="Page-Enter" content="revealTrans(duration=x, transition=y)">推出页面<meta http-equiv="Page-Exit" content="revealTrans(duration=x, transition=y)">这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使用哪种特效，取值为1-23:　　0 矩形缩小　　1 矩形扩大　　2 圆形缩小　　3 圆形扩大　　4 下到上刷新　　5 上到下刷新　　6 左到右刷新　　7 右到左刷新　　8 竖百叶窗　　9 横百叶窗　　10 错位横百叶窗　　11 错位竖百叶窗　　12 点扩散　　13 左右到中间刷新　　14 中间到左右刷新　　15 中间到上下　　16 上下到中间　　17 右下到左上　　18 右上到左下　　19 左上到右下　　20 左下到右上　　21 横条　　22 竖条　　23 网页是否允许被搜索引擎机器人检索 <meta name="ROBOTS" content="属性值">　　其中属性值有以下一些:　　属性值为"all": 文件将被检索，且页上链接可被查询；　　属性值为"none": 文件不被检索，而且不查询页上的链接；　　属性值为"index": 文件将被检索；　　属性值为"follow": 查询页上的链接；　　属性值为"noindex": 文件不检索，但可被查询链接；　　属性值为"nofollow": 全部不允许。打印分页 <p style="page-break-after:always">page1</p><p style="page-break-after:always">page2</p> 设置打印 <object id="factory" style="display:none" viewastext classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814" codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"></object><input type=button value=页面设置 onclick="factory.printing.PageSetup()"><input type=button value=打印预览 onclick="factory.printing.Preview()"><script language=javascript>function window.onload(){ // -- advanced features factory.printing.SetMarginMeasure(2) // measure margins in inches factory.printing.SetPageRange(false, 1, 3) // need pages from 1 to 3 factory.printing.printer = "HP DeskJet 870C" factory.printing.copies = 2 factory.printing.collate = true factory.printing.paperSize = "A4" factory.printing.paperSource = "Manual feed" // -- basic features factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页" factory.printing.footer = "（自定义页脚）" factory.printing.portrait = false factory.printing.leftMargin = 0.75 factory.printing.topMargin = 1.5 factory.printing.rightMargin = 0.75 factory.printing.bottomMargin = 1.5}function Print(frame) { factory.printing.Print(true, frame) // print with prompt}</script><input type=button value="打印本页" onclick="factory.printing.Print(false)"><input type=button value="页面设置" onclick="factory.printing.PageSetup()"><input type=button value="打印预览" onclick="factory.printing.Preview()"><br><a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a> 自带的打印预览 WebBrowser.ExecWB(1,1) 打开Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口Web.ExecWB(4,1) 保存网页Web.ExecWB(6,1) 打印Web.ExecWB(7,1) 打印预览Web.ExecWB(8,1) 打印页面设置Web.ExecWB(10,1) 查看页面属性Web.ExecWB(15,1) 好像是撤销，有待确认Web.ExecWB(17,1) 全选Web.ExecWB(22,1) 刷新Web.ExecWB(45,1) 关闭窗体无提示<style media=print>.Noprint{display:none;}.PageNext{page-break-after: always;}</style><object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></object><center class="Noprint" ><input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)><input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)><input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)></p><p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)></center> 去掉打印时的页眉页脚 <script language="JavaScript">var HKEY_Root,HKEY_Path,HKEY_Key;HKEY_Root="HKEY_CURRENT_USER";HKEY_Path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";//设置网页打印的页眉页脚为空function PageSetup_Null(){ try { var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); HKEY_Key="footer"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); } catch(e){}} 设置网页打印的页眉页脚为默认值 function PageSetup_Default(){ try { var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&w&b页码,&p/&P"); HKEY_Key="footer"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&u&b&d"); } catch(e){}}</script><input type="button" value="清空页码" onclick=PageSetup_Null()><input type="button" value="恢复页码" onclick=PageSetup_Default()> 浏览器验证 function checkBrowser(){ this.ver=navigator.appVersion this.dom=document.getElementById?1:0 this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0; this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; this.ie4=(document.all && !this.dom)?1:0; this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; this.ns4=(document.layers && !this.dom)?1:0; this.mac=(this.ver.indexOf('Mac') > -1) ?1:0; this.ope=(navigator.userAgent.indexOf('Opera')>-1); this.ie=(this.ie6 || this.ie5 || this.ie4) this.ns=(this.ns4 || this.ns5) this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope) this.nbw=(!this.bw) return this;} 计算内容宽和高 <SCRIPT language="javascript">function test(obj){ var range = obj.createTextRange(); alert("内容区宽度: " + range.boundingWidth + "px\r\n内容区高度: " + range.boundingHeight + "px");}</SCRIPT><BODY><Textarea id="txt" height="150">sdf</textarea><INPUT type="button" value="计算内容宽度" onClick="test(txt)"></BODY> 无模式的提示框 function modelessAlert(Msg){window.showModelessDialog("javascript :alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");} 屏蔽按键 <html><head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript> <title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title></head><body><script language="Javascript"><!-- //屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 //Author: meizz(梅花雨) 2002-6-18function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键function window.onhelp(){return false} //屏蔽F1帮助function document.onkeydown(){ if ((window.event.altKey)&& ((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ← (window.event.keyCode==39))) //屏蔽 Alt+ 方向键 → { alert("不准你使用ALT+方向键前进或后退网页！"); event.returnValue=false; } /* 注：这还不是真正地屏蔽 Alt+ 方向键，因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放，用鼠标点掉警告框，这种屏蔽方法就失效了。以后若有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/ if ((event.keyCode==8) || //屏蔽退格删除键 (event.keyCode==116)|| //屏蔽 F5 刷新键 (event.ctrlKey && event.keyCode==82)){ //Ctrl + R event.keyCode=0; event.returnValue=false; } if (event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11 if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //屏蔽 Ctrl+n if (event.shiftKey && event.keyCode==121)event.returnValue=false; //屏蔽 shift+F10 if (window.event.srcElement.tagName == "A" && window.event.shiftKey) window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页 if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4 { window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); return false; }}</script>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</body></html> 屏蔽打印 <style>@media print{* {display:none}}</style> 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 (1)拖拽访问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[i].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>

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