<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>如果时间早于 20:00，会获得问候 "Good day"。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction(){ var x=""; var time=new Date().getHours(); if (time<20){ x="Good day"; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>点击这个按钮，获得基于时间的问候。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction(){ var x=""; var time=new Date().getHours(); if (time<20){ x="Good day"; } else{ x="Good evening"; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>
<html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <script type="text/javascript"> var d = new Date(); var time = d.getHours(); if (time<10) { document.write("<b>早上好</b>"); } else if (time>=10 && time<16) { document.write("<b>今天好</b>"); } else { document.write("<b>晚上好!</b>"); } </script> <p> 这个例子演示了 if..else if...else 语句。 </p> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p id="demo"></p> <script> var r=Math.random(); var x=document.getElementById("demo") if (r>0.5){ x.innerHTML="<a href='http://www.runoob.com'>访问菜鸟教程</a>"; } else{ x.innerHTML="<a href='http://wwf.org'>Visit WWF</a>"; } </script> </body> </html>
