javaScript 简单计算器
<html>
<head>
<title></title>
<script language="javascript">
function sanshu(hao){
var score1=parseFloat(document.myForm.shu1.value);
var score2=parseFloat(document.myForm.shu2.value);
var sum;
if(hao=="+"){
sum=score1+score2;
document.myForm.shu3.value=sum;
}
else if(hao=="-"){
sum=score1-score2;
document.myForm.shu3.value=sum;
}
else if(hao=="*"){
sum=score1-score2;
document.myForm.shu3.value=sum;
}
else if(hao=="/"){
sum=score1/score2;
document.myForm.shu3.value=sum;
}
}
</script>
<form name="myForm" method="get" action=" ">
<table width="311" border="1" height="133">
<tr>
<td colspan="3" ><h2>计算器<h2></td>
</tr>
<tr>
<td>第一个数：</td>
<td><input name="shu1" type="text" size="10"></td>
<td rowspan="3">
<table>
<td>
<tr>
<input name="button1" type="button" value="+" onClick="sanshu('+')">
</tr>
</td>
<td>
<tr>
<input name="button2" type="button" value="-" onClick="sanshu('-')">
</td>
</tr>
<td>
<tr>
<input name="button3" type="button" value="*" onClick="sanshu('*')">
</td>
</tr>
<td>
<tr>
<input name="button4" type="button" value="/" onClick="sanshu('/')">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>第二个数：</td>
<td><input name="shu2" type="text" size="10"</td>
</tr>
<tr>
<td>结果是：</td>
<td><input name="shu3" type="text" size="10"></td>
</tr>
</table>
</form>
</head>
</html>
<head>
<title></title>
<script language="javascript">
function sanshu(hao){
var score1=parseFloat(document.myForm.shu1.value);
var score2=parseFloat(document.myForm.shu2.value);
var sum;
if(hao=="+"){
sum=score1+score2;
document.myForm.shu3.value=sum;
}
else if(hao=="-"){
sum=score1-score2;
document.myForm.shu3.value=sum;
}
else if(hao=="*"){
sum=score1-score2;
document.myForm.shu3.value=sum;
}
else if(hao=="/"){
sum=score1/score2;
document.myForm.shu3.value=sum;
}
}
</script>
<form name="myForm" method="get" action=" ">
<table width="311" border="1" height="133">
<tr>
<td colspan="3" ><h2>计算器<h2></td>
</tr>
<tr>
<td>第一个数：</td>
<td><input name="shu1" type="text" size="10"></td>
<td rowspan="3">
<table>
<td>
<tr>
<input name="button1" type="button" value="+" onClick="sanshu('+')">
</tr>
</td>
<td>
<tr>
<input name="button2" type="button" value="-" onClick="sanshu('-')">
</td>
</tr>
<td>
<tr>
<input name="button3" type="button" value="*" onClick="sanshu('*')">
</td>
</tr>
<td>
<tr>
<input name="button4" type="button" value="/" onClick="sanshu('/')">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>第二个数：</td>
<td><input name="shu2" type="text" size="10"</td>
</tr>
<tr>
<td>结果是：</td>
<td><input name="shu3" type="text" size="10"></td>
</tr>
</table>
</form>
</head>
</html>