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Windows Calculator
Always been fond of the calculator within Microsoft Windows? This JavaScript mimics the Windows calculator in appearance and function. Everyone, including Macintosh computer users, can now their own Windows Calculator!
Calculator
Insert into <HEAD>
<style type="text/css"> <!-- body {font-family: helvetica} p {font-size: 12pt} .red {color: red} .blue {color: blue} --> </style> <SCRIPT LANGUAGE="JavaScript"> <!-- Original: Steve Dulaney --> <!-- Web Site: http://www.hmhd.com/steve --> <!-- This script and many more are available free online at --> <!-- The JavaScript Source!! http://javascript.internet.com --> <!-- Begin var Memory = 0; var Number1 = ""; var Number2 = ""; var NewNumber = "blank"; var opvalue = ""; function Display(displaynumber) { document.calculator.answer.value = displaynumber; } function MemoryClear() { Memory = 0; document.calculator.mem.value = ""; } function MemoryRecall(answer) { if(NewNumber != "blank") { Number2 += answer; } else { Number1 = answer; } NewNumber = "blank"; Display(answer); } function MemorySubtract(answer) { Memory = Memory - eval(answer); } function MemoryAdd(answer) { Memory = Memory + eval(answer); document.calculator.mem.value = " M "; NewNumber = "blank"; } function ClearCalc() { Number1 = ""; Number2 = ""; NewNumber = "blank"; Display(""); } function Backspace(answer) { answerlength = answer.length; answer = answer.substring(0, answerlength - 1); if (Number2 != "") { Number2 = answer.toString(); Display(Number2); } else { Number1 = answer.toString(); Display(Number1); } } function CECalc() { Number2 = ""; NewNumber = "yes"; Display(""); } function CheckNumber(answer) { if(answer == ".") { Number = document.calculator.answer.value; if(Number.indexOf(".") != -1) { answer = ""; } } if(NewNumber == "yes") { Number2 += answer; Display(Number2); } else { if(NewNumber == "blank") { Number1 = answer; Number2 = ""; NewNumber = "no"; } else { Number1 += answer; } Display(Number1); } } function AddButton(x) { if(x == 1) EqualButton(); if(Number2 != "") { Number1 = parseFloat(Number1) + parseFloat(Number2); } NewNumber = "yes"; opvalue = '+'; Display(Number1); } function SubButton(x) { if(x == 1) EqualButton(); if(Number2 != "") { Number1 = parseFloat(Number1) - parseFloat(Number2); } NewNumber = "yes"; opvalue = '-'; Display(Number1); } function MultButton(x) { if(x == 1) EqualButton(); if(Number2 != "") { Number1 = parseFloat(Number1) * parseFloat(Number2); } NewNumber = "yes"; opvalue = '*'; Display(Number1); } function DivButton(x) { if(x == 1) EqualButton(); if(Number2 != "") { Number1 = parseFloat(Number1) / parseFloat(Number2); } NewNumber = "yes"; opvalue = '/'; Display(Number1); } function SqrtButton() { Number1 = Math.sqrt(Number1); NewNumber = "blank"; Display(Number1); } function PercentButton() { if(NewNumber != "blank") { Number2 *= .01; NewNumber = "blank"; Display(Number2); } } function RecipButton() { Number1 = 1/Number1; NewNumber = "blank"; Display(Number1); } function NegateButton() { Number1 = parseFloat(-Number1); NewNumber = "no"; Display(Number1); } function EqualButton() { if(opvalue == '+') AddButton(0); if(opvalue == '-') SubButton(0); if(opvalue == '*') MultButton(0); if(opvalue == '/') DivButton(0); Number2 = ""; opvalue = ""; } // End --> </script>
Insert into <BODY>
<center> <form name="calculator"> <table bgcolor="#aaaaaa" width=220> <tr><td> <table bgcolor="#cccccc" border=1> <tr><td> <table border=0 cellpadding=0> <tr><td bgcolor="#000080"><b style="color:white">Calculator</b></td></tr> <tr><td> <table width="100%" border=0> <tr><td colspan=6><input type="text" name="answer" size=30 maxlength=30 onChange="CheckNumber(this.value)"></td></tr> <tr><td colspan=6> <table border=0 cellpadding=0> <tr><td> <input type="text" name="mem" size=3 maxlength=3> <input type="button" name="backspace" class="red" value="Backspace" onClick="Backspace(document.calculator.answer.value); return false;"> <input type="button" name="CE" class="red" value=" CE " onClick="CECalc(); return false;"> <input type="reset" name="C" class="red" value=" C " onClick="ClearCalc(); return false;"> </td></tr> </table> </td></tr> <tr><td><input type="button" name="MC" class="red" value=" MC " onClick="MemoryClear(); return false;"></td> <td><input type="button" name="calc7" class="blue" value=" 7 " onClick="CheckNumber('7'); return false;"></td> <td><input type="button" name="calc8" class="blue" value=" 8 " onClick="CheckNumber('8'); return false;"></td> <td><input type="button" name="calc9" class="blue" value=" 9 " onClick="CheckNumber('9'); return false;"></td> <td><input type="button" name="divide" class="red" value=" / " onClick="DivButton(1); return false;"></td> <td><input type="button" name="sqrt" class="blue" value="sqrt" onClick="SqrtButton(); return false;"></td></tr> <tr><td><input type="button" name="MR" class="red" value=" MR " onClick="MemoryRecall(Memory); return false;"></td> <td><input type="button" name="calc4" class="blue" value=" 4 " onClick="CheckNumber('4'); return false;"></td> <td><input type="button" name="calc5" class="blue" value=" 5 " onClick="CheckNumber('5'); return false;"></td> <td><input type="button" name="calc6" class="blue" value=" 6 " onClick="CheckNumber('6'); return false;"></td> <td><input type="button" name="multiply" class="red" value=" * " onClick="MultButton(1); return false;"></td> <td><input type="button" name="percent" class="blue" value=" % " onClick="PercentButton(); return false;"></td></tr> <tr><td><input type="button" name="MS" class="red" value=" MS " onClick="MemorySubtract(document.calculator.answer.value); return false;"></td> <td><input type="button" name="calc1" class="blue" value=" 1 " onClick="CheckNumber('1'); return false;"></td> <td><input type="button" name="calc2" class="blue" value=" 2 " onClick="CheckNumber('2'); return false;"></td> <td><input type="button" name="calc3" class="blue" value=" 3 " onClick="CheckNumber('3'); return false;"></td> <td><input type="button" name="minus" class="red" value=" - " onClick="SubButton(1); return false;"></td> <td><input type="button" name="recip" class="blue" value="1/x " onClick="RecipButton(); return false;"></td></tr> <tr><td><input type="button" name="Mplus" class="red" value=" M+ " onClick="MemoryAdd(document.calculator.answer.value); return false;"></td> <td><input type="button" name="calc0" class="blue" value=" 0 " onClick="CheckNumber('0'); return false;"></td> <td><input type="button" name="negate" class="blue" value="+/- " onClick="NegateButton(); return false;"></td> <td><input type="button" name="dot" class="blue" value=" . " onClick="CheckNumber('.'); return false;"></td> <td><input type="button" name="plus" class="red" value=" + " onClick="AddButton(1); return false;"></td> <td><input type="button" name="equal" class="red" value=" = " onClick="EqualButton(); return false;"></td> </tr> </table> </td></tr> </table> </td></tr> </table> </td></tr> </table> </form> </center>
Other Options