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</head>
<STYLE type=text/css>INPUT {
FONT-SIZE: small ; WIDTH: 100%}
BODY {PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: x-small; PADDING-BOTTOM: 0px; MARGIN: 2px; PADDING-TOP: 0px; FONT-FAMILY: tahoma}
TD {VERTICAL-ALIGN: middle; TEXT-ALIGN: center}
TABLE {BORDER-RIGHT: #000 dashed ; BORDER-TOP: #000 dashed; MARGIN: 1px; BORDER-LEFT: #000 dashed; BORDER-BOTTOM: #000 dashed
border-size:1px}
</STYLE>
<SCRIPT language=JavaScript>  
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>
<FORM name=calculator>
<FONT color=#6699ff size=5><SPAN style="TEXT-DECORATION: none"></FONT></A>
<TABLE height=240 cellSpacing=0 cellPadding=2 width=360 align=center border=0>
  <TBODY>
  <TR>
    <TD colSpan=4><INPUT value=0 name=LED> </TD>
    <TD><INPUT onclick="Click('C')" type=button value=C name=C></TD>
    <TD width=60><INPUT id==2 onclick="Click('=')" type=button value== name==>
    </TD></TR>
  <TR>
    <TD colSpan=2><INPUT type=radio CHECKED value=on name=angle> Degrees</TD>
    <TD colSpan=2><INPUT type=radio value=on name=angle> Radians</TD>
    <TD colSpan=2><INPUT type=radio value=on name=angle> Gradients</TD></TR>
  <TR>
    <TD width=60><INPUT id=sin onclick="Click('sin')" type=button value=sin name=sin></TD>
    <TD width=60><INPUT id=cos onclick="Click('cos')" type=button value=cos name=cos></TD>
    <TD width=60><INPUT id=tab onclick="Click('tan')" type=button value=tan name=tab></TD>
    <TD width=60><INPUT id=sinh onclick="Click('sinh')" type=button value=sinh name=sinh></TD>
    <TD width=60><INPUT id=cosh onclick="Click('cosh')" type=button value=cosh name=cosh></TD>
    <TD width=60><INPUT id=tanh onclick="Click('tanh')" type=button value=tanh name=tanh></TD></TR>
  <TR>
    <TD width=60><INPUT id=asin onclick="Click('asin')" type=button value=asin name=asin></TD>
    <TD width=60><INPUT id=acos onclick="Click('acos')" type=button value=acos name=acos></TD>
    <TD width=60><INPUT id=atan onclick="Click('atan')" type=button value=atan name=atan></TD>
    <TD width=60><INPUT id=asinh onclick="Click('asinh')" type=button value=asinh name=asinh>
    </TD>
    <TD width=60><INPUT id=acosh onclick="Click('acosh')" type=button value=acosh name=acosh>
    </TD>
    <TD width=60><INPUT id=atanh onclick="Click('atanh')" type=button value=atanh name=atanh></TD></TR>
  <TR>
    <TD width=60><INPUT id=exp onclick="Click('exp')" type=button value=exp name=exp>
    </TD>
    <TD width=60><INPUT id=7 onclick="Click('7')" type=button value=7 name=7>
    </TD>
    <TD width=60><INPUT id=8 onclick="Click('8')" type=button value=8 name=8>
    </TD>
    <TD width=60><INPUT id=9 onclick="Click('9')" type=button value=9 name=9>
    </TD>
    <TD width=60><INPUT id=+ onclick="Click('+')" type=button value=+ name=+>
    </TD>
    <TD width=60><INPUT id=^ onclick="Click('^')" type=button value=^ name=^>
    </TD></TR>
  <TR>
    <TD width=60><INPUT id=log onclick="Click('log')" type=button value=log name=log>
    </TD>
    <TD width=60><INPUT id=4 onclick="Click('4')" type=button value=4 name=4>
    </TD>
    <TD width=60><INPUT id=5 onclick="Click('5')" type=button value=5 name=5>
    </TD>
    <TD
    width=60><INPUT id=6 onclick="Click('6')" type=button value=6 name=6></TD>
    <TD width=60><INPUT id=- onclick="Click('-')" type=button value=- name=->
    </TD>
    <TD width=60><INPUT id=1/x2 onclick="Click('1/x')" type=button value=1/x name=1/x>
    </TD></TR>
  <TR>
    <TD width=60><INPUT id=abs22 onclick="Click('ln')" type=button value=ln name=ln>
    </TD>
    <TD width=60><INPUT id=1 onclick="Click('1')" type=button value=1 name=1>
    </TD>
    <TD width=60><INPUT id=2 onclick="Click('2')" type=button value=2 name=2>
    </TD>
    <TD width=60><INPUT id=3 onclick="Click('3')" type=button value=3 name=3>
    </TD>
    <TD width=60><INPUT id=* onclick="Click('*')" type=button value=* name=*>
    </TD>
    <TD width=60><INPUT id=pi3 onclick="Click('pi')" type=button value=pi name=pi>
    </TD></TR>
  <TR>
    <TD width=60><INPUT id=sqrt onclick="Click('sqrt')" type=button value=sqrt name=sqrt>
    </TD>
    <TD width=60><INPUT id=0 onclick="Click('0')" type=button value=0 name=0>
    </TD>
    <TD width=60><INPUT id=. onclick="Click('.')" type=button value=. name=.>
    </TD>
    <TD width=60><INPUT id=+/-2 onclick="Click('+/-')" type=button value=+/- name=+/->
    </TD>
    <TD width=60><INPUT id=/ onclick="Click('/')" type=button value=/ name=/>
    </TD>
    <TD width=60><INPUT id=pi4 onclick="Click('e')" type=button value=e name=e>
  </TD></TR></TBODY></TABLE></FORM>
<P align=center></FONT></TD></TR></FORM></TD></TR></TBODY></TABLE>

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