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JS Calculator Instance Code

Source: Internet
Author: User
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<!doctype HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/ Xhtml1-transitional.dtd ">

<title>js Calculator </title>
<script type= "text/web Effects" >

var browser = new Object ();

Browser.ismozilla = (typeof document.implementation!= ' undefined ') && (typeof Document.implementation.createdocument!= ' undefined ') && (typeof htmldocument!= ' undefined ');
Browser.isie = Window.activexobject? True:false;
Browser.isfirefox = (navigator.userAgent.toLowerCase (). indexof ("Firefox")!=-1);
Browser.issafari = (navigator.userAgent.toLowerCase (). indexof ("Safari")!=-1);
Browser.isopera = (navigator.userAgent.toLowerCase (). indexof ("opera")!=-1);

var utils = new Object ();

Utils.htmlencode = function (text)
{
Return Text.replace (/&/g, ' & '). Replace (/"/g, '"). Replace (/</g, ' < '). Replace (/>/g, ' > ');
}

Utils.trim = function (text)
{
if (typeof (Text) = "string")
{
Return Text.replace (/^s*|s*$/g, "");
}
Else
{
return text;
}
}

Utils.isempty = function (val)
{
Switch (typeof (Val))
{
Case ' string ':
Return Utils.trim (val). length = 0? True:false;
Break
Case ' number ':
return val = = 0;
Break
Case ' object ':
return val = = null;
Break
Case ' array ':
return val.length = = 0;
Break
Default
return true;
}
}

Utils.isnumber = function (val)
{
var reg =/^[d|.|,]+$/;
Return Reg.test (Val);
}

Utils.isint = function (val)
{
if (val = = "")
{
return false;
}
var reg =/d+/;
Return!reg.test (Val);
}

Utils.isemail = function (email)
{
var reg1 =/([w.] +) @ ([[0-9]{1,3}. [0-9] {1,3}. [0-9] {1,3}.) | (([w-]+.) +)) ([a-za-z]{2,4}| [0-9] {1,3}) (]?) /;

return reg1.test (email);
}

Utils.istel = function (tel)
{
var reg =/^[d|-|s|_]+$/; Only use numbers-spaces, etc.

Return Reg.test (tel);
}

Utils.fixevent = function (e)
{
var evt = (typeof e = "undefined")? Window.event:e;
return evt;
}

Utils.srcelement = function (e)
{
if (typeof e = = "undefined") e = window.event;
var src = document.all? E.srcelement:e.target;

return SRC;
}

Utils.istime = function (val)
{
var reg =/^d{4}-d{2}-d{2}sd{2}:d {2}$/;

Return Reg.test (Val);
}

Utils.x = function (e)
{//current mouse x coordinates
return browser.isie?event.x + Document.documentelement.scrollleft-2:e.pagex;
}

Utils.y = function (e)
{//current mouse y-coordinate
return browser.isie?event.y + document.documentelement.scrolltop-2:e.pagey;
}

utils.request = function (URL, item)
{
var svalue=url.match (New RegExp ("[?]" "+item+" = ([^&]*) (ampersand), "I"));
return svalue?svalue[1]:svalue;
}

utils.$ = function (name)
{
return document.getElementById (name);
}

Function rowindex (tr)
{
  if (Browser.isie)
  {
    return tr.rowindex;
& nbsp
  Else
  {
    table = Tr.parentnode.parentnode
    for (i = 0; i < table.rows.length; i + +)
    {
      if (table.rows[i] = = TR)
       {
        return i;
     }
    }
 }

Document.getcookie = function (sname)
{
Cookies are separated by semicolons
var acookie = Document.cookie.split (";");
for (Var i=0 i < acookie.length; i++)
{
A Name/value pair (a crumb) is separated by a equal sign
var acrumb = acookie[i].split ("=");
if (sname = = Acrumb[0])
Return decodeURIComponent (acrumb[1]);
}

A cookie with the requested name does not exist
return null;
}

Document.setcookie = function (sname, svalue, Sexpires)
{
var Scookie = sname + "=" + encodeURIComponent (svalue);
if (sexpires!= null)
{
Scookie + = "; expires= "+ sexpires;
}

Document.cookie = Scookie;
}

Document.removecookie = function (Sname,svalue)
{
Document.cookie = sname + "=; Expires=fri, Dec 1999 23:59:59 GMT; ";
}

function GetPosition (o)
{
var t = o.offsettop;
var L = o.offsetleft;
while (o = o.offsetparent)
{
T + + o.offsettop;
L + + O.offsetleft;
}
var pos = {Top:t,left:l};
return POS;
}

function Cleanwhitespace (Element)
{
var element = element;
for (var i = 0; i < element.childnodes.length; i++) {
var node = element.childnodes[i];
if (Node.nodetype = = 3 &&!/s/.test (node.nodevalue))
Element.removechild (node);
}
}
</script>
<style type= "Text/css Tutorial" >
Body, Div, input {
font:12px Arial;
}

. Calculatorbutton {
Text-align:center;
width:73px;
}

. calculatorbutton2 {
Text-align:center;
width:154px;
}

*+html. Calculatorbutton2 {
width:157px;
}

#calculator. Buttonarea {
padding:3px;
Border-color: #455690 #a6b4cf #a6b4cf #455690;
Border-style:solid;
border-width:1px;
}

#calculatoroutput {
padding:2px; BORDER:2PX inset; margin:2px;
}

#topbar {


Position:absolute;


Border-right: #455690 1px solid;


Border-top: #a6b4cf 1px solid;


Border-left: #a6b4cf 1px solid;


Border-bottom: #455690 1px solid;


Background-color: #c9d3f3;


width:300px;


Visibility:hidden;


z-index:99999;


Filter:progid:dximagetransform.microsoft.basicimage (opacity=.65);


opacity:0.65;


}


&lt;/style&gt;


&lt;script type= "Text/javascript" &gt;


&lt;!--


var Calculator = object ();

Calculator.result = 0;
Calculator.current = ';
calculator.values = 0;
Calculator.handle = ';

Calculator.elem = function () {return document.getElementById (' calculator ');
Calculator.output = function () {return document.getElementById (' Calculatoroutput ');}

Calculator.input = function (n)
{
if (n = = "." && calculator.current.tostring (). indexof ('. ') >=0)
{
Return
}
var output = Calculator.output ();

if (calculator.current = = "0" && N!= ".") calculator.current = ';

Calculator.current + = "" + N;

output.innerhtml = calculator.current;
}

Calculator.backspace = function ()
{
var output = Calculator.output ();
output.innerhtml = output.innerhtml.length > 1? Output.innerhtml.substr (0, output.innerhtml.length-1): 0;

Calculator.current = output.innerhtml;
}

Calculator.clear = function ()
{
Calculator.result = 0;
Calculator.current = ';
calculator.values = 0;
Calculator.handle = ';

var output = Calculator.output ();
output.innerhtml = "0";
}

calculator.calculate = function (p)


{


if (calculator.handle!= ' &amp;&amp; calculator.values!= ' &amp;&amp; calculator.current!= ')


{


Try


{


var value = eval (calculator.values + calculator.handle + calculator.current)


Calculator.values = value = = ' Infinity '? 0:value;


Calculator.output (). innerHTML = Calculator.values


}


catch (E)


{


Alert (e);


}


}


Else


{


Calculator.values = calculator.current== '? Calculator.values:calculator.current;


}

if (p = = ' = ')
{
Calculator.output (). innerHTML = Calculator.values = = "? ' 0 ': calculator.values;
Calculator.current = calculator.values;
Calculator.handle = ';
}
Else
{
Calculator.handle = p;
}

Calculator.current = ';
}

onload = function () {
Window.focus ();
}
-->
</script>

&lt;body style= "Background:buttonface" &gt;


&lt;div class= "Buttonarea" &gt;


&lt;div id= "Calculatoroutput" style= "width:95%; text-align:right;border:2px inset;background: #fff; " &gt;0&lt;/div&gt;


&lt;table width= "100%" &gt;


&lt;tr&gt;


&LT;TD colspan= "2" &gt;&lt;input type= "button" class= "Calculatorbutton2" value= "Early Love" onclick= "Calculator.clear" () &gt;&lt;/td&gt;


&LT;TD colspan= "2" &gt;&lt;input type= "button" class= "Calculatorbutton2" value= "backspace" onclick= "Calculator.backspace" () /&gt;&lt;/td&gt;


&lt;/tr&gt;


&lt;tr&gt;


&lt;td&gt;&lt;input class= "Calculatorbutton" type= "button" value= "7" onclick= "Calculator.input (7)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "8" class= "Calculatorbutton" onclick= "Calculator.input (8)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "9" class= "Calculatorbutton" onclick= "Calculator.input (9)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "/" class= "Calculatorbutton" onclick= "calculator.calculate ('/')"/&gt;&lt;/ Td&gt;


&lt;/tr&gt;


&lt;tr&gt;


&lt;td&gt;&lt;input type= "button" value= "4" class= "Calculatorbutton" onclick= "Calculator.input (4)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "5" class= "Calculatorbutton" onclick= "Calculator.input (5)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "6" class= "Calculatorbutton" onclick= "Calculator.input (6)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "*" class= "Calculatorbutton" onclick= "calculator.calculate (' *")/&gt;&lt;/ Td&gt;


&lt;/tr&gt;


&lt;tr&gt;


&lt;td&gt;&lt;input type= "button" value= "1" class= "Calculatorbutton" onclick= "calculator.input (1)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "2" class= "Calculatorbutton" onclick= "Calculator.input (2)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "3" class= "Calculatorbutton" onclick= "Calculator.input (3)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "-" class= "Calculatorbutton" onclick= "calculator.calculate ('-')"/&gt;&lt;/ Td&gt;


&lt;/tr&gt;


&lt;tr&gt;


&lt;td&gt;&lt;input type= "button" value= "0" class= "Calculatorbutton" onclick= "calculator.input (0)"/&gt;&lt;/td&gt;


&lt;td&gt;&lt;input type= "button" value= "" class= "Calculatorbutton" onclick= "calculator.input ('. ')"/&gt;&lt;/td &gt;


&lt;td&gt;&lt;input type= "button" value= "=" class= "Calculatorbutton" onclick= "calculator.calculate (' = ')"/&gt;&lt;/ Td&gt;


&lt;td&gt;&lt;input type= "button" value= "+" class= "Calculatorbutton" onclick= "calculator.calculate (' + ')"/&gt;&lt;/ Td&gt;


&lt;/tr&gt;


&lt;tr&gt;


&LT;TD height= &gt; &lt;/td&gt;


&LT;TD colspan= "2" &gt;&lt;div align= "center" &gt;&lt;a href= "#" onclick= "Top.close ()" &gt; Close window &lt;/a&gt;&lt;/div&gt; &lt;/td&gt;


&lt;td&gt; &lt;/td&gt;


&lt;/tr&gt;


&lt;/table&gt;


&lt;/div&gt;


&lt;/body&gt;

<script type= "Text/javascript" >
<!--

Document.onkeyup = function (e)
{
var evt = utils.fixevent (e);

if (Evt.keycode &gt;= &amp;&amp; evt.keycode &lt;= &amp;&amp;!evt.shiftkey) | |


(Evt.keycode &gt;= &amp;&amp; evt.keycode &lt;=!evt.shiftkey))


{


if (Evt.keycode &gt; 57)


{


Calculator.input (evt.keycode-96);


}


Else


{


Calculator.input (evt.keycode-48);


}


}


else if ((Evt.keycode = = &amp;&amp;!evt.shiftkey) | | (Evt.keycode = &amp;&amp; Evt.shiftkey) | | (Evt.keycode = = 187 &amp;&amp; evt.shiftkey))


{


Calculator.calculate (' + ');


}


else if ((Evt.keycode = = 109 &amp;&amp;!evt.shiftkey) | | (Evt.keycode = = 189 &amp;&amp;!evt.shiftkey))


{


Calculator.calculate ('-');


}


else if ((Evt.keycode = &amp;&amp;!evt.shiftkey) | | (Evt.keycode = &amp;&amp; evt.shiftkey))


{


Calculator.calculate (' * ');


}


else if ((Evt.keycode = &amp;&amp;!evt.shiftkey) | | (Evt.keycode = = 191 &amp;&amp;!evt.shiftkey))


{


Calculator.calculate ('/');


}


else if (Evt.keycode = 13 | | (Evt.keycode = &amp;&amp;!evt.shiftkey) | | (Evt.keycode = = 187 &amp;&amp;!evt.shiftkey))


{


Calculator.calculate (' = ');


}


else if ((Evt.keycode = &amp;&amp;!evt.shiftkey) | | (Evt.keycode = = 190 &amp;&amp;!evt.shiftkey))


{


Calculator.input ('. ');


}


else if (Evt.keycode = 27)


{


Calculator.clear ();


}


else if (Evt.keycode = 8)


{


Calculator.backspace ();


}

return false;

alert (Evt.keycode);
}
-->
</script>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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