导读：<script>function err(){try{aaaalert("aeeeeeeeee");}catch(err){txt="aaaaaaa";txt+="bbbbbbbb";txt+="xxxxx";alert(txt);}}</script>--...
<script>
function err(){
try{
aaaalert("aeeeeeeeee");
}
catch(err){
txt="aaaaaaa";
txt+="bbbbbbbb";
txt+="xxxxx";
alert(txt);
}
}
</script>
----------------------------------------------------------------------------------------------------------------
<body>
<script>
function err(){
try{
var x=document.getElementById("demo").value;
if(x == "") throw "值为空";
if(isNaN(x)) throw "不是数字";
if(x>10) throw "太大";
if(x<5) throw "太小";
}catch(err){
var y=document.getElementById("mess");
y.innerHTML="错误:"+ err +"...";
}
}
</script>
<h1>我的第一个 JavaScript 程序</h1>
<p>请输入 5 到 10 之间的数字：</p>
<input id="demo" type="text">
<button onclick="err()">点击</button>
<p id="mess"></p>
</body>
