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Share the 55 most commonly used classic tips in Javascript_javascript tips

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Release: 2016-05-16 17:11:47
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1. oncontextmenu="window.event.returnValue=false" will completely block the right mouse button

no
can be used for Table

2. Cancel selection and prevent copying

3. onpaste="return false" No pasting allowed

4. oncopy="return false;" oncut="return false;" Prevent copying

5. Replace the IE address bar with your own icon

6. can display your icon in favorites


7. Turn off input method


8. Always carry frames


9. Prevent being framed


10. Web pages will not be saved as


11.
12. Confirm when deleting
Delete


13. Get the absolute position of the control

Copy the code The code is as follows:

//Javascript

//VBScript


14. The cursor is stopped at the end of the text box text
Copy code The code is as follows:



15. 判断上一页的来源
javascript :
document.referrer


16. 最小化、最大化、关闭窗口








本例适用于IE


17.屏蔽功能键Shift,Alt,Ctrl
<script><br>function look(){ <br>if(event.shiftKey) <br>alert("禁止按Shift键!"); //可以换成ALT CTRL<br>} <br>document.onkeydown=look; <br></script>


18. 网页不会被缓存



或者


19.怎样让表单没有凹凸感?



20.

&的区别?
(division)用来定义大段的页面元素,会产生转行
用来定义同一行内的元素,跟
的唯一区别是不产生转行
是ns的标记,ie不支持,相当于


21.让弹出窗口总是在最上面:


22.不要滚动条?
让竖条没有:


让横条没有:


两个都去掉?更简单了


23.怎样去掉图片链接点击后,图片周围的虚线?


24.电子邮件处理提交表单

enctype="text/plain">


25.在打开的子窗口刷新父窗口的代码里如何写?
window.opener.location.reload()


26.如何设定打开页面的大小

打开页面的位置


27.在页面中如何加入不是满铺的背景图片,拉动页面时背景图不动


28. 检查一段字符串是否全由数字组成


29. 获得一个窗口的大小
document.body.clientWidth; document.body.clientHeight


30. 怎么判断是否是字符
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


32. 日期减去天数等于第二个日期


33. 选择了哪一个Radio

Style
Barcode


34.脚本永不出错


35.ENTER键可以让光标移到下一个输入框


36. 检测某个网站的链接速度:
把如下代码加入区域中:


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
推出页面 
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 以上22种随机选择一种


39.在规定时间内跳转


40.网页是否被检索

  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
把如下代码加入区域中
webmaster@sina.com

42、流动边框效果的表格
把如下代码加入区域中

复制代码 代码如下:

<SCRIPT><br>l=Array(6,7,8,9,'a','b','b','c','d','e','f')<br>Nx=5;Ny=35<br>t="<table border=0 cellspacing=0 cellpadding=0 height=" ((Nx 2)*16) "><tr>"<br>for(x=Nx;x<Nx Ny;x )<BR>t ="<td width=16 id=a_mo" x "> </td>"<br>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>"<br>for(x=2;x<=Nx;x )<br>t ="<tr><td width=16 id=a_mo" (Nx-x) "> </td><td width=16 id=a_mo" (Ny Nx x-1) "> </td></tr>"<br>t ="<tr>"<br>for(x=Ny;x>0;x--)<br>t ="<td width=16 id=a_mo" (x Nx*2 Ny-1) "> </td>"<br>***(t "</tr></table>")<br>var N=Nx*2 Ny*2<br>function f1(y){<br>for(i=0;i<N;i ){<BR>c=(i y) ;if(c>10)c=20-c<br>document.all["a_mo" (i)].bgColor=""""#0000" l[c] l[c] "'"}<br>y <br>setTimeout('f1(' y ')','1')}<br>f1(1)<br></SCRIPT>

43、JavaScript主页弹出窗口技巧
窗口中间弹出
复制代码 代码如下:

<script><br>window.open("http://www.jb51.net","","width=400,height=240,top=" (screen.availHeight-240)/2 ",left=" (screen.availWidth-400)/2);<br></script>
============


");
    msg.***("

酷 毙 了!

这 是JavaScript所 开 的 视 窗!

");
}









==============
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:
复制代码 代码如下:

  
  

  
  

  
  


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:
复制代码 代码如下:

  <script> <br>  function drop(n) { <br>  if(self.moveBy){ <br>  self.moveBy (0,-900); <br>  for(i = n; i > 0; i--){ <br>  self.moveBy(0,3); <br>  } <br>  for(j = 8; j > 0; j--){ <br>  self.moveBy(0,j); <br>  self.moveBy(j,0); <br>  self.moveBy(0,-j); <br>  self.moveBy(-j,0); <br>  } <br>  } <br>  } <br>  </script>
  

3. I hate that many websites always open in the default window. It would be great if you could control the opened window as you wish.
The code is as follows:
Copy code The code is as follows:

 
 
 
 < td>
maxlength=4> pixels
Distance from the right: pixels
Window width: pixels
 Window height: pixels
 
 

 
 

 
 
 
 🎜>You only need to enter a value in the corresponding dialog box, and the window of the page to be opened is well controlled.

44. Open and move the page
Add the following code to the area

Copy the code

Copy code

Copy the code

The code is as follows:This is a simple HTML-page.
Last changes:





47. Cannot be empty and email address constraints:



Copy the code

The code is as follows:







Enter your name:




Enter your e-mail address:





48. Marquee
Copy code The code is as follows:

< html>



< ;body onLoad="scroll();return true;">
Your webpage can be displayed here!



49. Use buttons in the web page to control the display of the previous page, next page and home page.
Copy code The code is as follows:











50. View the source code of a certain website
Add the following code to the area In
Copy code The code is as follows:

<SCRIPT><br>function add() <br>{<br>var ress=document.forms[0].luxiaoqing.value<br>window.location="view-source:" ress;<br>}<br></SCRIPT>

Enter the URL address where you want to view the source code:
Copy the code The code is as follows:







51. Title displays date
Add the following code to the area:
Copy the code The code is as follows:



52. Show all links
Add the following code to the area
Copy the code The code is as follows: