<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>Title</title> ???<script>// ???????window.console.log();// ???????var ret1=window.confirm();// ???????var ret2=window.alert();// ???????var ret3=window.prompt();// ???????console.log(ret1,ret2,ret3); ???????var ID; ???????function tm() { ???????????date=new Date(); ???????????date=date.toLocaleString();// ???????????window.console.log(date); ???????????var ele=document.getElementById("tm"); ???????????ele.value=date; ???????} ???????function begin() { ???????????if (ID==undefined) { ???????????????tm(); ???????????????ID = setInterval(tm, 1000); ???????????} ???????????var ele1=document.getElementById("btn1"); ???????????ele1.disabled="disable"; ???????????var ele2=document.getElementById("btn2"); ???????????ele2.disabled=""; ???????} ???????function fin() { ???????????clearInterval(ID); ???????????var ele1=document.getElementById("btn2"); ???????????ele1.disabled="disable"; ???????????var ele2=document.getElementById("btn1"); ???????????ele2.disabled=""; ???????????ID=undefined; ???????} ???</script></head><body><div> ???<input type="text" id="tm"> ???<button id="btn1" onclick="begin()">start</button> ???<button id="btn2" onclick="fin()" disabled="disable">end</button></div></body></html>js输入框显示时间
原文地址：http://www.cnblogs.com/fenglin0826/p/7592559.html