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Summary of practical JavaScript skills you may not know
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- 2017-09-06 11:13:251480browse
A summary of practical javaScript skills you may not know
1. Completely block the right mouse button
oncontextmenu="window.event.returnValue=false" <table border oncontextmenu=return(false)><td>no</table> 可用于Table
2. Unselect and prevent copying
<body onselectstart="return false">
3. No pasting allowed
onpaste="return false"
4. Prevent copying
oncopy="return false;" oncut="return false;"
5. Replace the IE address bar with your own icon
<link rel="Shortcut Icon" href="favicon.ico">
6. You can display your icon in the favorites
<link rel="Bookmark" href="favicon.ico">
7. Close the input method
<input style="ime-mode:disabled">
8. Always carry a frame
<script language="JavaScript"><!-- if (window == top)top.location.href = "frames.htm"; //frames.htm为框架网页 // --></script>
9. Prevent others from being frame
<SCRIPT LANGUAGE=JAVASCRIPT><!-- if (top.location != self.location)top.location=self.location; // --></SCRIPT>
10. The page will not be saved as
<noscript><*** src="/*.html>";</***></noscript>
11. View Web page source code
<input type=button value="/ onclick="window.location = "view-source:"+ "http://www.pconline.com.cn"">
12. Confirm when deleting
<a href=""javascript :if(confirm("确实要删除吗?"))location="boos.asp?&areyou=删除&page=1"">删除</a>
13 . Get the absolute position of the control
//Javascript
<script language="Javascript">
function getIE(e){
var t=e.offsetTop;
var l=e.offsetLeft;
while(e=e.offsetParent){
t+=e.offsetTop;
l+=e.offsetLeft;
}
alert("top="+t+"/nleft="+l);
}
</script>
//VBScript
<script language="VBScript"><!--
function getIE()
dim t,l,a,b
set a=document.all.img1
t=document.all.img1.offsetTop
l=document.all.img1.offsetLeft
while a.tagName<>"BODY"
set a = a.offsetParent
t=t+a.offsetTop
l=l+a.offsetLeft
wend
msgbox "top="&t&chr(13)&"left="&l,64,"得到控件的位置"
end function
--></script>14. The cursor is stopped at the end of the text in the text box
<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()">15. Determine the source of the previous page
javascript : document.referrer
16. Minimize, maximize and close the window
<object id=hh1 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Minimize"></object> <object id=hh2 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Maximize"></object> <OBJECT id=hh3 classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"> <PARAM NAME="Command" value="/Close"></OBJECT> <input type=button value="/最小化 onclick=hh1.Click()> <input type=button value="/blog/最大化 onclick=hh2.Click()> <input type=button value=关闭 onclick=hh3.Click()> 本例适用于IE
17. Block function keys Shift, Alt, Ctrl
<script>
function look(){
if(event.shiftKey)
alert("禁止按Shift键!"); //可以换成ALT CTRL
}
document.onkeydown=look;
</script>18. Web pages will not be cached
<META HTTP-EQUIV="pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"> <META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT"> 或者<META HTTP-EQUIV="expires" CONTENT="0">
19. How to make the form non-convex?
<input type=text style="""border:1 solid #000000"> 或 <input type=text style="border-left:none; border-right:none; border-top:none; border-bottom: solid #000000"></textarea>
20. The difference between e388a4556c0f65e1904146cc1a846bee45a2772a6b6107b401db3c9b82c049c2&0a549f90cc8522f7f7074180d4b83d30?
<p>(pision)用来定义大段的页面元素，会产生转行 <span>用来定义同一行内的元素，跟<p>的唯一区别是不产生转行 <layer>是ns的标记，ie不支持，相当于<p>
21. Make the pop-up window always on top:
<body onblur="this.focus();">
22 . Don’t want scroll bars?
Let there be no vertical bars:
<body style="overflow:scroll;overflow-y:hidden"> </body>
Let there be no horizontal bars:
<body style="overflow:scroll;overflow-x:hidden"> </body>
Remove both? It’s easier
<body scroll="no"> </body>
23. How to remove the dotted line around the image after clicking on the image link?
<a href="#" onFocus="this.blur()"><img src="/logo.jpg" border=0></a>
24. Email processing submission form
<form name="form1" method="post" action=mailto:****@***.com enctype="text/plain"> <input type=submit> </form>
25. In the open How to write the code for the child window to refresh the parent window?
window.opener.location.reload()
26. How to set the size of the opened page
<body onload="top.resizeTo(300,200);"> 打开页面的位置<body onload="top.moveBy(300,200);">
27. How to add a non-full background image to the page so that the background image does not move when the page is pulled
<STYLE>
body
{background-image:url(/logo.gif); background-repeat:no-repeat;
background-position:center;background-attachment: fixed}
</STYLE>28. Check whether a string consists entirely of numbers
<script language="Javascript"><!--
function checkNum(str){return str.match(//D/)==null}
alert(checkNum("1232142141"))
alert(checkNum("123214214a1"))
// --></script>29. Get the size of a window
document.body.clientWidth; document.body.clientHeight
30. How to determine whether it is a character
if (/[^/x00-/xff]/g.test(s)) alert("含有汉字");
else alert("全是字符");31. TEXTAREA自适应文字行数的多少
<textarea rows=1 name=s1 cols=27 onpropertychange ="this.style.posHeight=this.scrollHeight"> </textarea>
32. 日期减去天数等于第二个日期
<script language=Javascript>
function cc(dd,dadd)
{
//可以加上错误处理
var a = new Date(dd)
a = a.valueOf()
a = a - dadd * 24 * 60 * 60 * 1000
a = new Date(a)
alert(a.getFullYear() + "年" + (a.getMonth() + 1) + "月" + a.getDate() + "日")
}
cc("12/23/2002",2)
</script>33. 选择了哪一个Radio
<HTML><script language="vbscript"> function checkme() for each ob in radio1 if ob.checked then window.alert ob.value next end function </script><BODY> <INPUT name="radio1" type="radio" value="/style" checked>Style <INPUT name="radio1" type="radio" value="/blog/barcode">Barcode <INPUT type="button" value="check" onclick="checkme()"> </BODY></HTML>
34. 脚本永不出错
<SCRIPT LANGUAGE="JavaScript">
<!-- Hide
function killErrors() {
return true;
}
window.onerror = killErrors;
// -->
</SCRIPT>35. ENTER键可以让光标移到下一个输入框
<input onkeydown="if(event.keyCode==13)event.keyCode=9">
36. 检测某个网站的链接速度：
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中:
<script language=Javascript>
tim=1
setInterval("tim++",100)
b=1
var autourl=new Array()
autourl[1]=1000){this.resized=true;this.style.width=1000;}" align=absMiddle border=0>www.njcatv.net"
autourl[2]="javacool.3322.net"
autourl[3]=1000){this.resized=true;this.style.width=1000;}" align=absMiddle border=0>www.sina.com.cn"
autourl[4]="www.nuaa.edu.cn"
autourl[5]=1000){this.resized=true;this.style.width=1000;}" align=absMiddle border=0>www.cctv.com"
function butt(){
***("<form name=autof>")
for(var i=1;i<autourl.length;i++)
***("<input type=text name=txt"+i+" size=10 value="/测试中……> =》<input type=text
name=url"+i+" size=40> =》<input type=button value="/blog/GO
onclick=window.open(this.form.url"+i+".value)><br>")
***("<input type=submit value=刷新></form>")
}
butt()
function auto(url){
document.forms[0]["url"+b].value=url
if(tim>200)
{document.forms[0]["txt"+b].value="/链接超时"}
else
{document.forms[0]["txt"+b].value="/blog/时间"+tim/10+"秒"}
b++
}
function run(){for(var i=1;i<autourl.length;i++)***("<img src=http://"+autourl+"/"+Math.random()+" width=1 height=1
onerror=auto("http://"+autourl+"")>")}
run()</script>37. 各种样式的光标
auto ：标准光标 default ：标准箭头 hand ：手形光标 wait ：等待光标 text ：I形光标 vertical-text ：水平I形光标 no-drop ：不可拖动光标 not-allowed ：无效光标 help ：?帮助光标 all-scroll ：三角方向标 move ：移动标 crosshair ：十字标 e-resize n-resize nw-resize w-resize s-resize se-resize sw-resize
38. 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: 矩形缩小 矩形扩大 圆形缩小 圆形扩大 下到上刷新 上到下刷新 左到右刷新 右到左刷新 竖百叶窗 横百叶窗 错位横百叶窗 错位竖百叶窗 点扩散 左右到中间刷新 中间到左右刷新 中间到上下 上下到中间 右下到左上 右上到左下 左上到右下 左下到右上 横条 竖条 以上22种随机选择一种
39. 在规定时间内跳转
<META http-equiv=V="REFRESH" content="5;URL=http://www.51js.com">
40.网页是否被检索
<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": 文件不被检索，但可查询页上的链接。
41. email地址的分割
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<a href="mailto:webmaster@sina.com">webmaster@sina.com</a>
42. 流动边框效果的表格
把如下代码加入<body>区域中
<SCRIPT>
l=Array(6,7,8,9,'a','b','b','c','d','e','f')
Nx=5;Ny=35
t="<table border=0 cellspacing=0 cellpadding=0 height="+((Nx+2)*16)+"><tr>"
for(x=Nx;x<Nx+Ny;x++)
t+="<td width=16 id=a_mo"+x+"> </td>"
t+="</tr><tr><td width=10 id=a_mo"+(Nx-1)+"> </td><td colspan="+(Ny-2)+" rowspan="+(Nx)+"> </td><td width=16 id=a_mo"+(Nx+Ny)+"></td></tr>"
for(x=2;x<=Nx;x++)
t+="<tr><td width=16 id=a_mo"+(Nx-x)+"> </td><td width=16 id=a_mo"+(Ny+Nx+x-1)+"> </td></tr>"
t+="<tr>"
for(x=Ny;x>0;x--)
t+="<td width=16 id=a_mo"+(x+Nx*2+Ny-1)+"> </td>"
***(t+"</tr></table>")
var N=Nx*2+Ny*2
function f1(y){
for(i=0;i<N;i++){
c=(i+y)%20;if(c>10)c=20-c
document.all["a_mo"+(i)].bgColor=""""#0000"+l[c]+l[c]+"'"}
y++
setTimeout('f1('+y+')','1')}
f1(1)
</SCRIPT>43. JavaScript主页弹出窗口技巧
窗口中间弹出
<script>
window.open("http://www.cctv.com","","width=400,height=240,top="+(screen.availHeight-240)/2+",left="+(screen.availWidth-400)/2);
</script>
============
<html>
<head>
<script language="LiveScript">
function WinOpen() {
msg=open("","DisplayWindow","toolbar=no,directories=no,menubar=no");
msg.***("<HEAD><TITLE>哈 罗!</TITLE></HEAD>");
msg.***("<CENTER><H1>酷 毙 了!</H1><h2>这 是<B>JavaScript</B>所 开 的 视 窗!</h2></CENTER>");
}
</script>
</head>
<body>
<form>
<input type="button" name="Button1" value="Push me" onclick="WinOpen()">
</form>
</body>
</html>
==============一、在下面的代码中，你只要单击打开一个窗口，即可链接到赛迪网。而当你想关闭时，只要单击一下即可关闭刚才打开的窗口。
代码如下：
<SCRIPT language="JavaScript">
<！--
function openclk() {
another=open('1000){this.resized=true;this.style.width=1000;}" align=absMiddle border=0>http://www.ccidnet.com'，'NewWindow');
}
function closeclk() {
another.close();
}
//-->
</SCRIPT>
<FORM>
<INPUT TYPE="BUTTON" NAME="open" value="/打开一个窗口" onClick="openclk()">
<BR>
<INPUT TYPE="BUTTON" NAME="close" value="/blog/关闭这个窗口" onClick="closeclk()">
</FORM>二、上面的代码也太静了，为何不来点动感呢？如果能给页面来个降落效果那该多好啊！
代码如下：
<script>
function drop(n) {
if(self.moveBy){
self.moveBy (0，-900);
for(i = n; i > 0; i--){
self.moveBy(0，3);
}
for(j = 8; j > 0; j--){
self.moveBy(0，j);
self.moveBy(j，0);
self.moveBy(0，-j);
self.moveBy(-j，0);
}
}
}
</script>
<body onLoad="drop(300)">三、讨厌很多网站总是按照默认窗口打开，如果你能随心所欲控制打开的窗口那该多好。
代码如下:
<SCRIPT LANGUAGE="JavaScript">
<！-- Begin
function popupPage(l， t， w， h) {
var windowprops = "location=no，scrollbars=no，menubars=no，toolbars=no，resizable=yes" +
"，left=" + l + "，top=" + t + "，width=" + w + "，height=" + h;
var URL = "http://www.80cn.com";
popup = window.open(URL，"MenuPopup"，windowprops);
}
// End -->
</script>
<table>
<tr>
<td>
<form name=popupform>
<pre class="brush:php;toolbar:false">
打开页面的参数<br>
离开左边的距离: <input type=text name=left size=2 maxlength=4> pixels
离开右边的距离: <input type=text name=top size=2 maxlength=4> pixels
窗口的宽度: <input type=text name=width size=2 maxlength=4> pixels
窗口的高度: <input type=text name=height size=2 maxlength=4> pixels
44. 页面的打开移动
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
for (t = 2; t > 0; t--) {
for (x = 20; x > 0; x--) {
for (y = 10; y > 0; y--) {
parent.moveBy(0,-x);
}
}
for (x = 20; x > 0; x--) {
for (y = 10; y > 0; y--) {
parent.moveBy(0,x);
}
}
for (x = 20; x > 0; x--) {
for (y = 10; y > 0; y--) {
parent.moveBy(x,0);
}
}
for (x = 20; x > 0; x--) {
for (y = 10; y > 0; y--) {
parent.moveBy(-x,0);
}
}
}
//-->
// End -->
</script>45. 显示个人客户端机器的日期和时间
<script language="LiveScript">
<!-- Hiding
today = new Date()
***("现 在 时 间 是： ",today.getHours(),":",today.getMinutes())
***("<br>今 天 日 期 为： ", today.getMonth()+1,"/",today.getDate(),"/",today.getYear());
// end hiding contents -->
</script>46. 自动的为你每次产生最後修改的日期了：
<html> <body> This is a simple HTML- page. <br> Last changes: <script language="LiveScript"> <!-- hide script from old browsers ***(document.lastModified) // end hiding contents --> </script> </body> </html>
47. 不能为空和邮件地址的约束：
<html>
<head>
<script language="JavaScript">
<!-- Hide
function test1(form) {
if (form.text1.value == "")
alert("您 没 写 上 任 何 东 西， 请 再 输 入 一 次 !")
else {
alert("嗨 "+form.text1.value+"! 您 已 输 入 完 成 !");
}
}
function test2(form) {
if (form.text2.value == "" ||
form.text2.value.indexOf('@', 0) == -1)
alert("这 不 是 正 确 的 e-mail address! 请 再 输 入 一 次 !");
else alert("您 已 输 入 完 成 !");
}
// -->
</script>
</head>
<body>
<form name="first">
Enter your name:<br>
<input type="text" name="text1">
<input type="button" name="button1" value="输 入 测 试" onClick="test1(this.form)">
<P>
Enter your e-mail address:<br>
<input type="text" name="text2">
<input type="button" name="button2" value="输 入 测 试" onClick="test2(this.form)">
</body>48. 跑马灯
<html>
<head>
<script language="JavaScript">
<!-- Hide
var scrtxt="怎麽样 ! 很酷吧 ! 您也可以试试."+"Here goes your message the visitors to your
page will "+"look at for hours in pure fascination...";
var lentxt=scrtxt.length;
var width=100;
var pos=1-width;
function scroll() {
pos++;
var scroller="";
if (pos==lentxt) {
pos=1-width;
}
if (pos<0) {
for (var i=1; i<=Math.abs(pos); i++) {
scroller=scroller+" ";}
scroller=scroller+scrtxt.substring(0,width-i+1);
}
else {
scroller=scroller+scrtxt.substring(pos,width+pos);
}
window.status = scroller;
setTimeout("scroll()",150);
}
//-->
</script>
</head>
<body onLoad="scroll();return true;">
这里可显示您的网页 !
</body>
</html>49. 在网页中用按钮来控制前页，后页和主页的显示。
<html> <body> <FORM NAME="buttonbar"> <INPUT TYPE="button" VALUE="Back" onClick="history.back()"> <INPUT TYPE="button" VALUE="JS- Home" onClick="location='script.html'"> <INPUT TYPE="button" VALUE="Next" onCLick="history.forward()"> </FORM> </body> </html>
50. 查看某网址的源代码
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<SCRIPT>
function add()
{
var ress=document.forms[0].luxiaoqing.value
window.location="view-source:"+ress;
}
</SCRIPT>输入要查看源代码的URL地址:
<FORM><input type="text" name="luxiaoqing" size=40 value="http://"></FORM> <FORM><br> <INPUT type="button" value="查看源代码" onClick=add()> </FORM>
51. title显示日期
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中:
<script language="JavaScript1.2">
<!--hide
var isnMonth = new
Array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");
var isnDay = new
Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六","星期日");
today = new Date () ;
Year=today.getYear();
Date=today.getDate();
if (document.all)
document.title="今天是: "+Year+"年"+isnMonth[today.getMonth()]+Date+"日"+isnDay[today.getDay()]
//--hide-->
</script>52. 显示所有链接
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<script language="JavaScript1.2">
<!--
function extractlinks(){
var links=document.all.tags("A")
var total=links.length
var win2=window.open("","","menubar,scrollbars,toolbar")
win2.***("<font size='2'>一共有"+total+"个连接</font><br>")
for (i=0;i<total;i++){
win2.***("<font size='2'>"+links[i].outerHTML+"</font><br>")
}
}
//-->
</script>
<input type="button" onClick="extractlinks()" value="显示所有的连接">53. 回车键换行
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<script type="text/javascript">
function handleEnter (field, event) {
var keyCode = event.keyCode ? event.keyCode : event.which ?
event.which : event.charCode;
if (keyCode == 13) {
var i;
for (i = 0; i < field.form.elements.length; i++)
if (field == field.form.elements[i])
break;
i = (i + 1) % field.form.elements.length;
field.form.elements[i].focus();
return false;
}
else
return true;
}
</script>
<form>
<input type="text" onkeypress="return handleEnter(this, event)"><br>
<input type="text" onkeypress="return handleEnter(this, event)"><br>
<textarea>回车换行54. 确认后提交
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<SCRIPT LANGUAGE="JavaScript">
<!--
function msg(){
if (confirm("你确认要提交嘛！"))
document.lnman.submit()
}
//-->
</SCRIPT>
<form name="lnman" method="post" action="">
<p>
<input type="text" name="textfield" value="确认后提交">
</p>
<p>
<input type="button" name="Submit" value="提交" onclick="msg();">
</p>
</form>55. 改变表格的内容
把如下代码加入6c04bd5ca3fcae76e30b72ad730ca86d区域中
<script ***script> var arr=new Array() arr[0]="一一一一一"; arr[1]="二二二二二"; arr[2]="三三三三三"; </script> <select onchange="zz.cells[this.selectedIndex].innerHTML=arr[this.selectedIndex]"> <option value=a>改变第一格</option> <option value=a>改变第二格</option> <option value=a>改变第三格</option> </select> <table id=zz border=1> <tr height=20> <td width=150>第一格</td> <td width=150>第二格</td> <td width=150>第三格</td> </tr> </table>
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