代码示例：（标识：jsck_state_throw_error）
<!DOCTYPE html>
<html>
<body>
<p>请输入一个 5 到 10 之间的数字：</p>
<input id="demo" type="text">
<button type="button" onclick="myFunction()">检查输入</button>
<p id="message"></p>
<script>
function myFunction() {
var message, x;
message = document.getElementById("message");
message.innerHTML = "";
x = document.getElementById("demo").value;
try {
if(x == "") throw "is Empty";
if(isNaN(x)) throw "not a number";
if(x > 10) throw "too high";
if(x < 5) throw "too low";
}
catch(err) {
message.innerHTML = "Input " + err;
}
}
</script>
</body>
</html>
