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Script Name: Scientific calculator
Author: Denis Makarov
Description: The name says it all - Awesome Scientific Calculator

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The AC CODE

var Result=0, Operator=0, Second=0, Ready=0, Done=1, Complete=0, Integer, CurrentValue;

function reset(value)

{

document.calculator.LED.value = value;

Result = 0, Operator = 0, Second = 0, Ready = 0; Done = 1; Complete = 0;

}

function SetValue(NewValue)

{

Integer = 1;

if(Second || Done)

{

Second = 0;

Done = 0;

CurrentValue = NewValue;

}

for(var i=0; i<CurrentValue.length; i++)

if (CurrentValue[i]=='.')

Integer=0;

}

function Click(Caption)

{

CurrentValue = document.calculator.LED.value;

if(Caption=='.')

{

SetValue('0');

if(Integer)

{

CurrentValue += Caption;

document.calculator.LED.value = CurrentValue;

Complete = 0;

}

if (Caption.length == 1 && Caption>='0' && Caption<='9')

{

SetValue('');

if(CurrentValue=='0')

CurrentValue='';

CurrentValue += Caption;

document.calculator.LED.value = CurrentValue;

Complete = 1;

}

if (Caption=='pi')

{

CurrentValue = Math.PI;

document.calculator.LED.value = CurrentValue;

Complete = 1;

}

if (Caption=='e')

{

CurrentValue = Math.E;

document.calculator.LED.value = CurrentValue;

Complete = 1;

}

if(Caption=='-' || Caption=='+' || Caption=='/' || Caption=='*' || Caption=='^')

{

if(Second)

Operator = Caption

else

{

if(!Ready)

{

Operator = Caption;

Result = CurrentValue;

Ready=1;

} else

{

if (Operator=='^')

Result = Math.pow(Result, CurrentValue);

else

Result = eval(Result + Operator + CurrentValue);

Operator = Caption; document.calculator.LED.value = Result;

} Complete=0; Second = 1;

}

if(Caption=='1/x' )

{

Result = eval('1/' + CurrentValue) ; reset(Result);

}

if(Caption=='sqrt')

{

Result = Math.sqrt(CurrentValue);

reset(Result);

}

if(Caption=='exp' )

{

Result = Math.exp(CurrentValue);

reset(Result);

}

if(Caption=='log' )

{

Result = Math.log(CurrentValue) / Math.LN10;

reset(Result);

}

if(Caption=='ln' )

{

Result = Math.log(CurrentValue);

reset(Result);

}

if(Caption=='sin' )

{

Result = CurrentValue;

if (document.calculator.angle[0].checked)

Result = Result * Math.PI / 180;

if (document.calculator.angle[2].checked)

Result = Result * Math.PI / 200;

Result = Math.sin(Result);

reset(Result);

}

if(Caption=='cos' )

{

Result = CurrentValue;

if (document.calculator.angle[0].checked)

Result = Result * Math.PI / 180;

if (document.calculator.angle[2].checked)

Result = Result * Math.PI / 200;

Result = Math.cos(Result);

reset(Result);

}

if(Caption=='tan' )

{

Result = CurrentValue;

if (document.calculator.angle[0].checked)

Result = Result * Math.PI / 180;

if (document.calculator.angle[2].checked)

Result = Result * Math.PI / 200;

Result = Math.tan(Result);

reset(Result);

}

if(Caption=='asin' )

{

Result = Math.asin(CurrentValue);

if (document.calculator.angle[0].checked)

Result = Result * 180 / Math.PI;

if (document.calculator.angle[2].checked)

Result = Result * 200 / Math.PI;

reset(Result);

}

if(Caption=='acos' )

{

Result = Math.acos(CurrentValue);

if (document.calculator.angle[0].checked)

Result = Result * 180 / Math.PI;

if (document.calculator.angle[2].checked)

Result = Result * 200 / Math.PI;

reset(Result);

}

if(Caption=='atan' )

{

Result = Math.atan(CurrentValue);

if (document.calculator.angle[0].checked)

Result = Result * 180 / Math.PI;

if (document.calculator.angle[2].checked)

Result = Result * 200 / Math.PI;

reset(Result);

}

if(Caption=='sinh' )

{

Result = Math.exp(CurrentValue);

Result = (Result - 1 / Result) / 2;

reset(Result);

}

if(Caption=='cosh' )

{

Result = Math.exp(CurrentValue);

Result = (Result + 1 / Result) / 2;

reset(Result);

}

if(Caption=='tanh' )

{

Result = Math.exp(CurrentValue);

Result = (Result - 1 / Result) / (Result + 1 / Result);

reset(Result);

}

if(Caption=='asinh' )

{

//sign(x) * log(|x| + sqrt(x*x+1))

//	alert(CurrentValue + Math.sqrt(CurrentValue * CurrentValue + 1));

//	Result = Math.log(CurrentValue + Math.sqrt(CurrentValue * CurrentValue + 1));

Result = CurrentValue / Math.abs(CurrentValue) * Math.log(Math.abs(CurrentValue) + Math.sqrt(CurrentValue * CurrentValue + 1));

reset(Result);

}

if(Caption=='acosh' )

{

//2 log  (sqrt((x+1)/2) + sqrt((x-1)/2))

Result = 2 * Math.log(Math.sqrt((CurrentValue + 1) / 2) + Math.sqrt((CurrentValue - 1) / 2));

reset(Result);

}

if(Caption=='atanh' )

{

//0.5*log((x-1)/(x+1))

Result = Math.log((CurrentValue - 1) / (CurrentValue + 1)) / 2;

reset(Result);

}

if(Caption=='+/-')

document.calculator.LED.value = eval(-CurrentValue);

if(Caption=='=' && Complete && Operator!='0')

{

if (Operator=='^')

{

Result = Math.pow(Result, CurrentValue);

reset(Result);

} else

reset(eval(Result + Operator + CurrentValue));

}

if (Caption=='C')

reset(0);

if(document.calculator.LED.value[0] == '.')

document.calculator.LED.value = '0' + document.calculator.LED.value;

}

</script>

</HEAD>

<BODY>

</script> 
<noscript> 
This email address is being protected from spam bots, you need Javascript enabled to view it
</noscript> 
) -->

<h1 align="center">Scientific calculator</h1>

<tr>

</td>

</tr>

<tr>

Degrees</td>

Radians</td>

Gradients</td>

</tr>

<tr>

</tr>

<tr>

</td>

</td>

</tr>

<tr>

</td>

</td>

</td>

</td>

</td>

</td>

</tr>

<tr>

</td>

</td>

</td>

</td>

</td>

</tr>

<tr>

</td>

</td>

</td>

</td>

</td>

</td>

</tr>

<tr>

</td>

</td>

</td>

</td>

</td>

</td>

</tr>

</table>

</form>