<!DOCTYPE html><html><head><meta charset="utf-8"><title>捕获异常</title></head> ???<script type="text/javascript">function my_func(){try{x=document.getElementById("input_id").value;alert(x);if(x==""||x==null) throw "非空";if(isNaN(x)) throw "必须是数字";if(x<5) throw "数字太小";if(x>10) throw "数字太大";else throw "输入正确";}catch(err){document.getElementById("demo").innerHTML="提示:"+err;} ???}</script><body><p>请输入5——10之间的数字</p><input type="text" id="input_id"> </input><button type="button" id="button_id" onclick="my_func()">确定</button><p id = "demo"></p></body></html>
用js检测文本框中输入的是否符合条件并有错误和正确提醒
原文地址:https://www.cnblogs.com/zxrxzw/p/10792589.html