<script language="JavaScript"> 

<!-- hide script from old browser 

var answer=0 

var lastvalue=0 

var op="+" 

var lastop="+" 

var newnumber=true 

function input(digit){ 

if (op==" = ") 

clearall() 

if ((!newnumber)&&(document.calc.result.value!="0")) 

document.calc.result.value+=eval(digit) 

else 

document.calc.result.value=""+eval(digit) 

newnumber=false 

} 

function clearnow(){ 

document.calc.result.value="_" 

newnumber=true 

} 

function clearall(){ 

answer=0 

lastop="+" 

op="+" 

clearnow() 
} 

function operate(operation){ 

if ((newnumber!=true)||(op==" = ")) 

{ 

answer=""+answer 

if ((operation!=" = ") && (op!=" = ")) 

{ 

lastvalue=document.calc.result.value 

lastop=op 

answer=eval(answer+lastop+lastvalue) 

document.calc.result.value=answer 

} 

else if (operation==" = ") 

{ 

if (op!=" = ") 

{ 

lastop=op 


lastvalue=document.calc.result.value 

} 

answer=eval(answer+lastop+lastvalue) 

document.calc.result.value=answer 

} 

newnumber=true 

} 

op=operation 

} 
function change(){ 

answer=-1*document.calc.result.value 

document.calc.result.value=answer 

} 
 
function point(){ 

if (!newnumber) 

{ 

number=document.calc.result.value 

if (number.indexOf('.')==-1) 

document.calc.result.value+="." 

}  

} 

// end hiding --> 

</script></font><font 

color="#FFFFFF"><script language="JavaScript"> 

<!-- hide script from old browser 

var answer=0 

var lastvalue=0 

var op="+"  

var lastop="+" 

var newnumber=true 

function input(digit){ 

if (op==" = ") 

clearall() 

if ((!newnumber)&&(document.calc.result.value!="0")) 
 
document.calc.result.value+=eval(digit) 

else 

document.calc.result.value=""+eval(digit) 

newnumber=false 

} 

function clearnow(){ 

document.calc.result.value="_" 

newnumber=true 
} 

function clearall(){ 

answer=0 

lastop="+" 

op="+" 

clearnow() 

} 

function operate(operation){ 

if ((newnumber!=true)||(op==" = ")) 

{ 

answer=""+answer 

if ((operation!=" = ") && (op!=" = ")) 

{ 

lastvalue=document.calc.result.value 

lastop=op 

answer=eval(answer+lastop+lastvalue) 
document.calc.result.value=answer 
} 
else if (operation==" = ") 

{ 
if (op!=" = ") 
{ 

lastop=op 

lastvalue=document.calc.result.value 

} 

answer=eval(answer+lastop+lastvalue) 

document.calc.result.value=answer 

} 

newnumber=true 

} 

op=operation 

} 

function change(){ 

answer=-1*document.calc.result.value 

document.calc.result.value=answer 

} 

function point(){ 

if (!newnumber) 

{ 
number=document.calc.result.value 

if (number.indexOf('.')==-1) 

document.calc.result.value+="." 

}  
} 
// end hiding --> 

</script></font></td> 
</tr> 

</table> 

</center></div> 

<form name="calc"> 

<div align="center"><center><table border="1" cellspacing="1"> 

<tr> 

<td colspan="5"><input type="text" size="14" 

name="result" value="_" onfocus="blur()"> </td> 

</tr> 

<tr> 

<td><input type="button" name="1" value=" 1 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="2" value=" 2 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="3" value=" 3 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="CE" value=" CE " 

onclick="clearall()"></td> 

<td><input type="button" name="C" value=" C " 

onclick="clearnow()"></td> 

</tr> 

<tr> 

<td><input type="button" name="4" value=" 4 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="5" value=" 5 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="6" value=" 6 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="sing" value=" +/- " 

onclick="change()"></td> 

<td><input type="button" name="=" value=" = " 

onclick="operate(this.value)"></td> 

</tr> 

<tr> 

<td><input type="button" name="7" value=" 7 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="8" value=" 8 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="9" value=" 9 " 

onclick="input(this.value)"></td> 

<td><input type="button" name="+" value=" + " 

onclick="operate(this.value)"></td> 

<td><input type="button" name="-" value=" - " 

onclick="operate(this.value)"></td> 

</tr> 

<tr> 

<td colspan="2"><input type="button" name="0" 

value=" 0 " onclick="input(this.value)"></td> 

<td><input type="button" name="." value=" . " 

onclick="point()"></td> 

<td><input type="button" name="*" value=" * " 

onclick="operate(this.value)"></td> 

<td><input type="button" name="/" value=" / " 

onclick="operate(this.value)"></td> 

</tr> 

</table> 

</center></div> 

</form> 
注意:無
					
                        
 
                         

							
							 本篇文章發表於2001-04-20 00:00