语法：
array.every(function(currentValue,index,arr), thisValue)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<p>检测数组的所有元素是否都大于输入框中指定的数字。</p>
<p>最小年龄: <input type="number" id="ageToCheck" value="18"></p>
<button onclick="myFunction()">点我</button>
<p>是否所有年龄都符号条件? <span id="demo"></span></p>
<script>
var ages = [32, 33, 9, 40];
function check(age){
return document.getElementById("ageToCheck").value<=age
}
function myFunction(){
document.getElementById("demo").innerHTML=ages.every(check)
}
</script>
</body>
</html>
