一个朋友跟我说要去给某个比赛算分；
规则：去掉最低分最高分求平均分；
最近在学习大数据可视化——图谱，用到js一些东西，所以今天就用js练练
用到知识点：
js限制输入数字能输入小数点,js定义数组，js往数组中添加数据，js将字符型转为数字型，除法结果保留两位小数。
最后通过cpolar将内网暴露，把网址发给朋友，以达到使用的（装X）效果：https://www.cnblogs.com/sengzhao666/p/11912246.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div align="center">
<form action="" method="post" onsubmit="return avg()">
<thead>
<tr ><th colspan=2 style="text-align:center">比赛算分</th></tr>
</thead>
<table>
<tr>
<td>评委1</td>
<!--只能输入数字,能输小数点.-->
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score1"></td>
</tr>
<tr>
<td>评委2</td>
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score2"></td>
</tr>
<tr>
<td>评委3</td>
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score3"></td>
</tr>
<tr>
<td>评委4</td>
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score4"></td>
</tr>
<tr>
<td>评委5</td>
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score5"></td>
</tr>
<tr>
<td>评委6</td>
<td><input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')" id="score6"></td>
</tr>
</table>
<div>
<button type="submit" >确认</button>
<button type="reset" >重填</button>
</div>
</form>
</div>
<script type="text/javascript">
function avg() {
var score1 = document.getElementById("score1");
var score2 = document.getElementById("score2");
var score3 = document.getElementById("score3");
var score4 = document.getElementById("score4");
var score5 = document.getElementById("score5");
var score6 = document.getElementById("score6"); var s1= parseFloat(score1.value);//强行转换为Float型
var s2= parseFloat(score2.value);
var s3= parseFloat(score3.value);
var s4= parseFloat(score4.value);
var s5= parseFloat(score5.value);
var s6= parseFloat(score6.value); var score=new Array();
score[1]=s1;
score[2]=s2;
score[3]=s3;
score[4]=s4;
score[5]=s5;
score[6]=s6; var min=s1;
var max=s1;
for(var i=1;i<=6;i++){
if(min>score[i]){
min=score[i];
}
}
//alert(min);
for(var i=1;i<=6;i++){
if(max<score[i]){
max=score[i];
}
}
//alert(max);
var count=0;
for(var i=1;i<=6;i++){
count=count+score[i];
}
//alert(count);
var count1=count-min-max;
//alert(count1);
var scoreavg=count1/4;
//alert(scoreavg);
alert("计算平均得分为" + scoreavg.toFixed(2));//保留两位小数
}
</script>
</body>
</html>
运行截图：
