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How do you perform the calculation by java script?

Updated: 8/11/2023
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Wiki User

∙ 8y ago
Best Answer

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<HTML xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/HTML; charset=UTF-8" />

<title>Untitled Document</title>

<link href="lightbox-styles.css" rel="stylesheet" type="text/css" />

<script language="javascript" type="text/javascript">

function currencyFormat(fld, milSep, decSep, e) {

var sep = 0;

var key = '';

var i = j = 0;

var len = len2 = 0;

var strCheck = '0123456789';

var aux = aux2 = '';

var whichCode = (window.Event) ? e.which : e.keyCode;

if (whichCode 3) {

aux2 += milSep;

j = 0;

}

aux2 += aux.charAt(i);

j++;

}

fld.value = '';

len2 = aux2.length;

for (i = len2 - 1; i >= 0; i--)

fld.value += aux2.charAt(i);

fld.value += decSep + aux.substr(len - 2, len);

}

return false;

}

function deleteChar(Input)

{

Input.value = Input.value.substring(0, Input.value.length - 1);

}

function validate()

{

var n=document.Calc.Input.value; //Get the value of textbox into variable

if (n<0.1 n >10) {

alert("Please enter a value in the range of 0.1 to 10.0 ml/sec");

document.Calc.Input.value='';

}

else {

document.getElementById('displ').value = document.getElementById('junk').value;

document.getElementById('light1').style.display='none';

document.Calc.Input.value='';

document.getElementById('fade1').style.display='none';

}

}

</script>

</head>

<body>

<p><a href="javascript:void(0)" onclick = "document.getElementById('light1').style.display='block';document.getElementById('fade1').style.display='block';document.Calc.Input.value='';"><input type="text" id="displ" readonly="readonly" /></a></p>

<div id="light1" class="white_content">

<form name="Calc">

<div>

<input type="text" name="Input" id="junk" size="16" onkeypress="return(currencyFormat(this,',','.',event))" />

<input type="button" id="backspace" value="Backspace" onclick="deleteChar(this.form.Input)" />

</div>

<div class="first">

<input type="button" name="one" VALUE=" 1 " Onclick="Calc.Input.value += '1'">

<input type="button" name="two" VALUE=" 2 " Onclick="Calc.Input.value += '2'">

<input type="button" name="three" VALUE=" 3 " Onclick="Calc.Input.value += '3'">

</div>

<div class="second">

<input type="button" name="four" VALUE=" 4 " Onclick="Calc.Input.value += '4'">

<input type="button" name="five" VALUE=" 5 " Onclick="Calc.Input.value += '5'">

<input type="button" name="six" VALUE=" 6 " Onclick="Calc.Input.value += '6'">

</div>

<div class="third">

<input type="button" name="seven" VALUE=" 7 " Onclick="Calc.Input.value += '7'">

<input type="button" name="eight" VALUE=" 8 " Onclick="Calc.Input.value += '8'">

<input type="button" name="nine" VALUE=" 9 " Onclick="Calc.Input.value += '9'">

</div>

<div class="fourth">

<input type="reset" name="cancel" VALUE="Cancel" Onclick="Calc.Input.value += ''">

<input type="button" name="zero" VALUE=" 0 " Onclick="Calc.Input.value += '0'">

<input type="button" name="enter" VALUE="Enter" Onclick="validate();">

</div>

</form><a href = "javascript:void(0)" onclick = "document.getElementById('light1').style.display='none';document.getElementById('fade1').style.display='none'">Close</a></div>

<div id="fade1" class="black_overlay"></div>

</body>

<!-- honey -->

</HTML>

User Avatar

Wiki User

∙ 12y ago
This answer is:
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User Avatar

Wiki User

∙ 13y ago

done by Nadia Sawda and Syed Erfan Habib

<html>

<form>

<head>

<script type="text/javascript">

var temp2=0;

var num=0;

var y=0;

var temp4=0;

var j=11;

var flag=10;

var temp8=0;

var temp7=0;

var val=0;

var k=99;

function input(x)

{

if(k==0)

{

var temp=document.getElementById("r").value+=x;

temp2=parseFloat(temp);

}

}

function of()

{

if(j==0)

{

temp2=0;

temp3=1;

temp7=0;

flag=10;

document.getElementById("r").value="0";

j=1;

k=0;

}

else

{

temp2=0;

temp3=1;

temp7=0;

flag=10;

document.getElementById("r").value="";

j=0;

k=1;

}

}

function ac()

{

if(k==0)

{

temp2=0;

temp7=0;

temp3=1;

flag=10;

document.getElementById("r").value="0";

}

}

function add()

{

if(k==0 && flag!=4 && flag!=5 && flag!=6)

{

temp7=parseFloat(temp2)+parseFloat(temp7);

document.getElementById("r").value="";

flag=0;

}

if(k==0 && flag==4)

{

document.getElementById("r").value="";

flag=0;

}

if(k==0 && flag==5)

{

document.getElementById("r").value="";

flag=1;

}

if(k==0 && flag==6)

{

document.getElementById("r").value="";

flag=1;

}

}

function minus()

{

if(k==0 && flag!=4 && flag!=5 && flag!=6)

{

temp7=parseFloat(temp7)+parseFloat(temp2);

document.getElementById("r").value="";

flag=1;

}

if(k==0 && flag==4)

{

document.getElementById("r").value="";

flag=0;

}

if(k==0 && flag==5)

{

document.getElementById("r").value="";

flag=1;

}

if(k==0 && flag==6)

{

document.getElementById("r").value="";

flag=1;

}

}

function multip()

{

if(k==0)

{

temp7=temp2;

document.getElementById("r").value="";

flag=2;

}

}

function divis()

{

if(k==0)

{

temp7=temp2;

temp2=document.getElementById("r").value="";

flag=3;

}

}

function point()

{

if(k==0)

{

temp2=document.getElementById("r").value+=".";

}

}

function equal()

{

if(flag==0 flag==4)

{

if(k==0)

{

document.getElementById("r").value="";

temp7=document.getElementById("r").value=parseFloat(temp7) + parseFloat(temp2);

flag=4;

}

}

if(flag==1 flag==77)

{

if(k==0)

{

document.getElementById("r").value="";

temp7=document.getElementById("r").value=parseFloat(temp7) - parseFloat(temp2);

flag=77;

}

}

if(flag==2 flag==5)

{

if(k==0)

{

num=temp7;

temp7=document.getElementById("r").value=parseFloat(temp7) * parseFloat(temp2);

flag=5;

}

}

if(flag==3 flag==6)

{

if(k==0)

{

num=temp7;

temp7=document.getElementById("r").value=parseFloat(temp7) / parseFloat(temp2);

temp8=temp7;

flag=6;

}

}

}

function displayDate()

{

document.getElementById("d").value=Date();

document.getElementById("yr").value= " 2011";

var today=new Date();

var h=today.getHours();

var m=today.getMinutes();

var s=today.getSeconds();

m=checkTime(m);

s=checkTime(s);

document.getElementById('t').value=h+":"+m+":"+s;

tm=setTimeout('displayDate()',500);

}

function checkTime(i)

{

if (i<10)

{

i="0" + i;

}

return i;

}

</script>

<style type="text/css">

table, td, th

{

border:10px solid black;

}

td

{

background-color:black;

color:black;

}

</style>

</head>

<body>

<form>

<center>

<table border="10" bgcolor="red">

<tr>

<td>

<input type="text" size="13" maxlength="10" id="r" name="r" disabled="disabled" readonly="readonly">

/>

</td>

<td>

<input type="button" onclick="ac()" size="5" value=" C " />

</td>

<td>

<input type="button" onclick="of()" value=" On/OFF " />

</td>

</tr>

<tr>

<td>

<center>

<input type="button" onclick="input(1)" size="5" value="1" />

<input type="button" onclick="input(2)" size="5" value="2" />

<input type="button" onclick="input(3)" size="5" value="3" />

</center>

</td>

<td>

<center>

<input type="button" onclick="add()" size="5" value="+" />

</center>

</td>

<td>

<center>

<input type="text" size="8" id="d" name="d" disabled="disabled" readonly="readonly" />

</center>

</td>

</tr>

<tr>

<td>

<center>

<input type="button" onclick="input(4)" value="4" />

<input type="button" onclick="input(5)" value="5" />

<input type="button" onclick="input(6)" value="6" />

</center>

</td>

<td>

<center>

<input type="button" onclick="minus()" value="-" />

</center>

</td>

<td>

<center>

<input type="text" size="8" id="yr" name="yr" disabled="disabled" readonly="readonly" />

</center>

</td>

</tr>

<tr>

<td>

<center>

<input type="button" onclick="input(7)" value="7" />

<input type="button" onclick="input(8)" value="8" />

<input type="button" onclick="input(9)" value="9" />

</center>

</td>

<td>

<center>

<input type="button" onclick="multip()" value="*" />

</center>

</td>

<td>

<center>

<input type="text" size="8" id="t" name="t" disabled="disabled" readonly="readonly" />

</center>

</td>

</tr>

<tr>

<td>

<center>

<input type="button" onclick="input(0)" value="0" />

<input type="button" onclick="point()" value=" . "/>

<input type="button" onclick="equal()" value=" = " />

</center>

</td>

<td>

<center>

<input type="button" onclick="divis()" value=" / " />

</center>

</td>

<td>

<center>

<input type="button" onclick="displayDate()" value=" Date " />

</center>

</td>

</tr>

<table>

</center>

</form>

</body>

</html>

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User Avatar

Wiki User

∙ 12y ago

This easy-to-use computer language can be self-taught. Besides going to a bookstore and buying a book on it or hiring someone to write it for you, there are sites you can visit that offer tutorials on using this language to write Web pages, and plenty of examples you can play with.

Search the Web for "javascript tutorial" (without the quotes) and the first page of results will have plenty of starting points for you.

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User Avatar

Wiki User

∙ 11y ago

You cannot make a scientific calculator which will do calculations using pure HTML. HTML is not a programming language, so it only for laying out and formatting things. So you could design the look of it, like the buttons and display, but to make it actually calculate you will need some programming language and build that into the web page.

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User Avatar

Wiki User

∙ 9y ago

You can perform calculation by simple operators. You have to do all of that by defining a function().

This answer is:
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