JS
创建一个欢迎cookie
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>123</title> </head> <head> <script> function setCookie(cname,cvalue,exdays){ var d = new Date(); d.setTime(d.getTime()+(exdays*24*60*60*1000)); var expires = "expires="+d.toGMTString(); document.cookie = cname+"="+cvalue+"; "+expires; } function getCookie(cname){ var name = cname + "="; var ca = document.cookie.split(';'); for(var i=0; i<ca.length; i++) { var c = ca[i].trim(); if (c.indexOf(name)==0) { return c.substring(name.length,c.length); } } return ""; } function checkCookie(){ var user=getCookie("username"); if (user!=""){ alert("欢迎 " + user + " 再次访问"); } else { user = prompt("请输入你的名字:",""); if (user!="" && user!=null){ setCookie("username",user,30); } } } </script> </head> <body onload="checkCookie()"></body> </html>
一个简单的记时
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>123</title> </head> <body> <p>点击按钮，在等待 3 秒后弹出 "Hello"。</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ setTimeout(function(){alert("Hello")},3000); } </script> </body> </html>
另一个简单的计时
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>123</title> </head> <head> <script> function timedText(){ var x=document.getElementById('txt'); var t1=setTimeout(function(){x.value="2 秒"},2000); var t2=setTimeout(function(){x.value="4 秒"},4000); var t3=setTimeout(function(){x.value="6 秒"},6000); } </script> </head> <body> <form> <input type="button" value="显示文本时间!" onclick="timedText()" /> <input type="text" id="txt" /> </form> <p>点击上面的按钮，输出的文本将告诉你2秒，4秒，6秒已经过去了。</p> </body> </html>