javascript 在前端应用体验小技巧继续积累。
事件源对象 event.srcElement.tagName
event.srcElement.type
捕获释放 event.srcElement.setCapture();
event.srcElement.releaseCapture();
事件按键 event.keyCode event.shiftKey
event.altKey event.ctrlKey
事件返回值 event.returnValue
鼠标位置 event.x event.y
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COOKIE document.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);
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CSS document.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"
自动刷新 <meta HTTP-EQUIV="refresh" CONTENT="8;URL=http://c98.yeah.net">
简单邮件 <a href="mailto:aaa@bbb.com?subject=ccc&body=xxxyyy">
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]/
让英文字符串超出表格宽度自动换行word-wrap: break-word; word-break: break-all;
透明背景 <IFRAME src="1.htm" width=300 height=180 allowtransparency></iframe>
获得style内容 obj.style.cssText
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]
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)">
title换行 obj.title = "123
sdfs "
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
checkbox扁平 <input type=checkbox style="position: absolute; clip:rect(5px 15px 15px 5px)"><br>
获取选中内容
document.selection.createRange().duplicate().text
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
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IE window.open("aa.htm", "meizz", "fullscreen=7");
统一编码/解码
alert(decodeURIComponent(encodeURIComponent("http://你好.com?as= hehe"))) 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
//消除图像工具栏
//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
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))
//检查网页是否存在
//连接数据库
//使用数据岛
//设置光标位置
//操作EXECL
<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
//netscapte下操作xml
doc = new ActiveXObject("Msxml2.DOMDocument"); doc = new ActiveXObject("Microsoft.XMLDOM") ->> doc = (new DOMParser()).parseFromString(sXML,'text/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.
//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>
//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[i]; }
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=".." onload = "DrawImage(this)">
//细线SELECT
<span style="border:1px solid #000000; position:absolute; overflow:hidden;" > <select style="margin:-2px;"> <option>1111</option> <option>11111111111111</option> <option>111111111</option> </select></span>
//Import
function Import() { for( var i=0; i<arguments.length; i++ ) {
var file = arguments[i]; if ( file.match(/\.js$/i))
document.write('<script type=\"text/javascript\" src=\"' + file + '\"></sc' + 'ript>');
else
document.write('<style type=\"text/css\">@import \"' + file + '\" ;</style>');
} };
//js枚举
function getComputerName() { var objWMIService = GetObject("Winmgmts:root\cimv2"); for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext())
{ var getComputer = e.item();
return getComputer.Name; }
}
//条件编译
<script language=javascript>
/*@cc_on @*/ /*@if (@_win32 && @_jscript_version>5)
function window.confirm(str) {
execScript("n = msgbox('"+ str +"', 257)", "vbscript");
return(n == 1); } @end @*/ </script>
//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>
//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()" >
以上所述就是本文的全部内容了，希望大家能够喜欢。