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声明一个变量，为它赋值，然后显示出来 !DOCTYPE htmlhtmlhead meta charset="utf-8" title滴答编程(dida100.com)/title /headbodyscriptvar firstname;firstname="Hege";document.write(firstname);document.write("br");firstname="T...

If 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp如果时间早于 20:00，会获得问候 "Good day"。/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/pscriptfunction myFunctio...

If...else 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击这个按钮，获得基于时间的问候。/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/pscriptfunction myFunct...

随机链接 !DOCTYPE htmlhtmlhead meta charset="utf-8" title滴答编程(dida100.com)/title /headbodyp id="demo"/pscriptvar r=Math.random();var x=document.getElementById("demo")if (r0.5){x.innerHTML="a href='http://www.dida100.com'访问滴答...

Switch 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击下面的按钮来显示今天是周几：/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/pscriptfunction myFunction(){...

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Alert(警告)框 !DOCTYPE htmlhtmlheadmeta charset="utf-8"scriptfunction myFunction(){alert("你好，我是一个警告框！");}/script/headbodyinput type="button" onclick="myFunction()" value="显示警告框" //body/html 尝试一下...

带有换行的警告框 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击按钮在弹窗中使用换行。/pbutton onclick="myFunction()"点我/buttonp id="demo"/pscriptfunction myFunction(){aler...

确认框 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击按钮，显示确认框。/pbutton onclick="myFunction()"点我/buttonp id="demo"/pscriptfunction myFunction(){var x;var r=confirm("按下...