Hi Guys, here's the code for making a calculator for your browser. It works in any browser like IE, Mozilla, Safari, Chrome..... Well it looks best in safari
step 1 :
Copy the code given below in Notepad
<html>
<head>
<title>Browser Calculator by simplywriting89.blogspot.com</title>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function addChar(input, character) {
if(input.value == null || input.value == "0")
input.value = character
else
input.value += character
}
function cos(form) {
form.display.value = Math.cos(form.display.value);}
function sin(form) {
form.display.value = Math.sin(form.display.value);}
function tan(form) {
form.display.value = Math.tan(form.display.value);}
function sqrt(form) {
form.display.value = Math.sqrt(form.display.value);}
function ln(form) {
form.display.value = Math.log(form.display.value);}
function exp(form) {
form.display.value = Math.exp(form.display.value);}
function sqrt(form) {
form.display.value = Math.sqrt(form.display.value);}
function deleteChar(input) {
input.value = input.value.substring(0, input.value.length - 1)
}
function changeSign(input) {
if(input.value.substring(0, 1) == "-")
input.value = input.value.substring(1, input.value.length)
else
input.value = "-" + input.value
}
function compute(form) {
form.display.value = eval(form.display.value)}
function square(form) {
form.display.value = eval(form.display.value) *
eval(form.display.value)}
function checkNum(str) {
for (var i = 0; i < str.length; i++) {
var ch = str.substring(i, i+1)
if (ch < "0" || ch > "9") {
if (ch != "/" && ch != "*" && ch != "+" && ch !=
"-" && ch != "."
&& ch != "(" && ch!= ")") {
alert("invalid entry!")
return false
}
}
}
return true
}
// End -->
</SCRIPT>
</head>
<body bgcolor="#FFFFFF">
<FORM>
<table width="335px" cellpadding="0" cellspacing="0" border="0" name="Calculator">
<tr><td align="center"><input name="display" value="0" size=25></td></tr>
</table>
<table width="335px" cellpadding="0" cellspacing="0" border="0" name="Cal Body">
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" exp " onClick="if (checkNum(this.form.display.value)) { exp(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 7 " onClick="addChar(this.form.display, '7')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 8 " onClick="addChar(this.form.display, '8')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 9 " onClick="addChar(this.form.display, '9')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" / " onClick="addChar(this.form.display, '/')"></td>
</tr>
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" ln " onClick="if (checkNum(this.form.display.value)) { ln(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 4 " onClick="addChar(this.form.display, '4')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 5 " onClick="addChar(this.form.display, '5')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 6 " onClick="addChar(this.form.display, '6')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" * " onClick="addChar(this.form.display, '*')"></td>
</tr>
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" sqrt" onClick="if (checkNum(this.form.display.value)) {sqrt(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 1 " onClick="addChar(this.form.display, '1')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 2 " onClick="addChar(this.form.display, '2')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 3 " onClick="addChar(this.form.display, '3')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" - " onClick="addChar(this.form.display, '-')"></td>
</tr>
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" sq " onClick="if (checkNum(this.form.display.value)) { square(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" 0 " onClick="addChar(this.form.display, '0')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" . " onClick="addChar(this.form.display, '.')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" +/- " onClick="changeSign(this.form.display)"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" + " onClick="addChar(this.form.display, '+')"></td>
</tr>
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" ( " onClick="addChar(this.form.display, '(')"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" cos " onClick="if (checkNum(this.form.display.value)) { cos(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" sin " onClick="if (checkNum(this.form.display.value)) {sin(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" tan " onClick="if (checkNum(this.form.display.value)) { tan(this.form) }"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" ) " onClick="addChar(this.form.display, ')')"></td>
</tr>
</table>
<table width="335px" cellpadding="0" cellspacing="0" border="0" name="Cal Foot">
<tr>
<td align="center"><input style="font-family : monospace" type="button" value=" Clear " onClick="this.form.display.value = 0 "></td>
<td align="center"><input style="font-family : monospace" type="button" value=" Back Space " onClick="deleteChar(this.form.display)"></td>
<td align="center"><input style="font-family : monospace" type="button" value=" Enter " name="enter"onClick="if (checkNum(this.form.display.value)) { compute(this.form) }"></td>
</tr>
</table>
</FORM>
</body>
</html>
Step 2 :
Save it as calculator.html (You can save it by any name but remember that name is followed by the extension .html)
