1 <html> 2 <head> 3 <meta charset="utf-8"> 4 <title>定时警告</title> 5 </head> 6 <body> 7 <!--定时警告的问题--> 8 <h1>定时警告的问题</h1> 9 <input type="button" value="定时警告" onclick="setTimeMsg()"/> 10 <script language="javascript"> 11 function setTimeMsg(){ 12 setTimeout('alert("hello world!!!")',3000);//3s 13 } 14 </script> 15 <hr> 16 <!--计数器--> 17 <h1>计数器</h1> 18 <input type="button" value="开始计时" onclick="startTime()"/> 19 <input type="text" id="num"/><br> 20 <input type="button" value="结束计时" onclick="stopTime()"/> 21 22 <script language="javascript"> 23 var i=0; 24 var t; 25 function startTime(){ 26 document.getElementById("num").value=i; 27 i=i+1; 28 t=setTimeout("startTime()",10);//1s 29 } 30 31 function stopTime(){ 32 clearTimeout(t); 33 } 34 </script> 35 36 </body> 37 </html>
1 <html> 2 <head> 3 <meta charset="utf-8"> 4 <title>定时警告</title> 5 </head> 6 <body onload="startTime()"> 7 <h1>秒表<div id="time"></div></h1> 8 <script language="javascript"> 9 function startTime(){ 10 var date=new Date(); 11 var year=date.getFullYear(); 12 var month=date.getMonth()+1; 13 var day=date.getDate(); 14 var hour=date.getHours(); 15 var minute=date.getMinutes(); 16 var second=date.getSeconds(); 17 //var str=year+"年"+month+"月"+day+"日"+hour+":"+minute+":"+second; 18 var str=hour+":"+minute+":"+second; 19 20 document.getElementById("time").innerHTML=str; 21 setTimeout("startTime()",1000); 22 } 23 </script> 24 </body> 25 </html>
