<!DOCTYPE html><html> <head> <title> 事件</title> <script type="text/javascript"> function count(){ var x=document.getElementById("txt1"); var y=document.getElementById("txt2"); switch(select){ case "+": sum=x+y;break; case "-": sum=x-y;break; case "*": sum=x*y;break; case "/": sum=x/y;break; default : sum="default"; break; } } ducument.getElementById("fruit").value = sum; </script> </head> <body> <input type='text' id='txt1' /> <select id='select'> <option value='+'>+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type='text' id='txt2' /> <input type='button' value=' = ' onClick="count()"/> <!--通过 = 按钮来调用创建的函数，得到结果--> <input type='text' id='fruit' /> </body></html>
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qq_位卑未敢忘忧国_0
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<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<input type='text' name="txt1" id='txt1'/>
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' name="txt2" id='txt2'/>
<input type='button' name="but" value='=' onclick="s()"/>
<input type='text' name="te" id='fruit' value=""/>
</body>
</html>
<script type="text/javascript">
function s(){
var sum = document.getElementById("fruit");
var x = document.getElementById("txt1").value;
var y = document.getElementById("txt2").value;
var he =x*1+y*1;
var cha =x*1-y*1;//减
var ji =x*y*1;//乘
var chu = x/y*1;//除
var select=document.getElementById("select").value;
switch(select){
case "+": sum.value=he; break;
case "-": sum.value=cha;break;
case "*": sum.value=ji; break;
case "/": sum.value=chu;break;
default : sum.value="default";
}
}
</script>
修改 了 下 复制 看看
qq_轉裑灬巳陌_0
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<!DOCTYPE html>
<html>
<head>
<title> 事件</title>
<script type="text/javascript">
function count(){
var sum=0;
var x=parseInt(document.getElementById("txt1").value);
var y=parseInt(document.getElementById("txt2").value);
var select=document.getElementById("select").value;
switch(select){
case "+": sum=x+y;break;
case "-": sum=x-y;break;
case "*": sum=x*y;break;
case "/": sum=x/y;break;
default : sum="default"; break;
}
document.getElementById("fruit").value = sum;
}
</script>
</head>
<body>
<input type='text' id='txt1' />
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' id='txt2' />
<input type='button' value=' = ' onClick="count()"/> <!--通过 = 按钮来调用创建的函数，得到结果-->
<input type='text' id='fruit' />
</body>
</html>
Caballarii
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switch(select){//select呢？document.getElementById("select")去哪儿了？
ducument.getElementById("fruit").value = sum;这句怎么到了函数外面？document也拼错了
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