关于Javascript问题，郁闷！

eArt 2010-01-06 11:19:48

各位，请帮忙看下以下代码有什么错误，我找了半天也没发现错误，但运行后却不能正常执行。谢谢！

----

<html>

<head>

<title>JavaScript计算器</title>

</head>



<script language="JavaScript">

var curState;

var curOper;

var num1;

var preOper;



function setStartState()

{

  curState="beStart";

  num1=0;

  curOper="start";

  preOper=false;

}



function addNum(i)

{

  if(preOper)

  {

    cal.total.value=i;

    preOper=false;

    

  }

  else

  {

    if(cal.total.value=="0")

    {

     cal.total.value=i;

     curState ="beInteger";

    }

    else

    {

     cal.total.value+=i;

    }

  }

  

}

function addPoint()

{

  if(curState=="beStart"||curState=="beInteger")

     {

       cal.total.value+=".";

       curState="beFloat";

     }

}

function cleartext()

 {

  cal.total.value="0";

  curState="beStart";

  curOper"start";

 }

 function count()

 {

  if(curOper!="start")

  {

  switch(curOper)

  {

   case "+":

   num1=parseFloat(num1)+parseFloat(cal.total.value);

   break;

   

   case "-":

   num1=parseFloat(num1)-parseFloat(cal.total.value);

   break;

   

   case "*":

   num1=parseFloat(num1)*parseFloat(cal.total.value);

   break;

   

   case "/":

   num1=parseFloat(num1)/parseFloat(cal.total.value);

   break;

  }

  cal.total.value=num1;

  preOper=true;

  }

  curOper="start";

  

 }

 

 function setOper(oper)

 {

  preOper = true;

    if(curOper = "start")

    {

     num1=0+cal.total.value;

     curOper = oper;

    }

    else

    {

     count();

     curOper=oper;

    }

 }

 

 function useFunc(func)

 {

   switch(func)

   {

    case "sin":

    cal.total.value=Math.sin(cal.total.value);

    preOper=true;

    break;

    

    case "cos":

    cal.total.value = Math.cos(cal.total.value);

    proOper=true;

    break;

    

    case "asin":

    cal.total.value = Math.asin(cal.total.value);

    proOper=true;

    break;

    

    case "acos":

    cal.total.value = Math.acos(cal.total.value);

    proOper=true;

    break;

    

    case "tan":

    cal.total.value = Math.tan(cal.total.value);

    proOper=true;

    break;

    

    case "atan":

    cal.total.value = Math.atan(cal.total.value);

    proOper=true;

    break;

    

    case "log":

    cal.total.value = Math.log(cal.total.value);

    proOper=true;

    break;

    

    case "exp":

    cal.total.value = Math.exp(cal.total.value);

    proOper=true;

    break;

    

    case "sqrt":

    cal.total.value = Math.sqrt(cal.total.value);

    proOper=true;

    break;

    

    case "1/x":

    cal.total.value = 1/cal.total.value;

    proOper=true;

    break;

    

    

   }

 }

</script>



<body onload="setStartState()">

<font size="6">JavaScript计算器</font>

<form name="cal">



<table border="2" align="left">

<tr align="center">

<td colspan="6">

<input type="text" name="total" size="40" value="0">

</td>

</tr>

<tr align="center">

<td>

<input type="button" value="sin " onclick="useFunc('sin')">

</td>

<td>

 <input type="button" value="cos " onclick="useFunc('cos')">

 </td>

 <td>

 <input type="button" value="1  " onclick="addNum('1')">

 </td>

 <td>

 <input type="button" value="2  " onclick="addNum('2')">

 </td>

 <td>

 <input type="button" value="3  " onclick="addNum('3')">

 </td>

 <td>

 <input type="button" value="+  " onclick="setOper('+')">

 </td>

</tr>

<tr align="center">

<td>

<input type="button" value="asin" onclick="useFunc('asin')">

</td>

<td>

<input type="button" value="acos" onclick="useFunc('acos')">

</td>

<td>

<input type="button" value="4  " onclick="addNum('4')">

</td>

<td>

<input type="button" value="5  "  onclick="addNum('5')">

</td>

<td>

<input type="button" value="6  " onclick="addNum('6')">

</td>

<td>

<input type="button" value="-  " onclick="setOper('-')">

</td>

</tr>

<tr align="center">

<td>

<input type="button" value="tan " onclick="useFunc('tan')">

</td>

<td>

<input type="button" value="atan" onclick="useFunc('atan')">

</td>

<td>

<input type="button" value="7  "  onclick="addNum('7')">

</td>

<td>

<input type="button" value="8  " onclick="addNum('8')">

</td>

<td>

<input type="button" value="9  " onclick="addNum('9')">

</td>

<td>

<input type="button" value="*  " onclick="setOper('*')">

</td>

</tr>

<tr align="center">

<td>

<input type="button" value="log " onclick="useFunc('log')">

</td>

<td>

<input type="button" value="exp " onclick="useFunc('exp')">

</td>

<td>

<input type="button" value="0  " onclick="addNum('0')">

</td>

<td>

<input type="button" value=".  " onclick="addPoint()">

</td>

<td>

<input type="button" value="=  " onclick="count()">

</td>

<td>

<input type="button" value="/  " onclick="setOper('/')">

</td>

</tr>

<tr align="center">

<td>

<input type="button" value="sqrt" onclick="useFunc('sqrt')">

</td>

<td>

<input type="button" value="1/x " onclick="useFunc('1/x')">

</td>

<td>

<input type="button" value=" pi " onclick="cal.total.value = Math.PI">

</td>

<td>

<input type="button" value=" E  " onclick="cal.total.value = Math.E">

</td>

<td colspan="2">

<input type="button" value=" 清 除 " onclick="cleartext()">

</td>

</tr>

</table>

</form>







</body>



</html>

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yzone 2010-01-06

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改这里就对了function cleartext()
{
cal.total.value="0";
curState="beStart";
curOper="start";
}

eArt 2010-01-06

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楼上的你太有才了。谢谢你，好眼力！！！

浪尖赏花 2010-01-06

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curOper"start";

====>

curOper = "start";

eArt 2010-01-06

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type="button" value=" E " onclick="cal.total.value = Math.E">
</td>
<td colspan="2">
<input type="button" value=" 清除 " onclick="cleartext()">
</td>
</tr>
</table>
</form>

</body>

</html>