Do while 循环 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击下面的按钮，只要 i 小于 5 就一直循环代码块。/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/pscrip...

break 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击按钮，测试带有 break 语句的循环。/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/pscriptfunction myFunction...

continue 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击下面的按钮来执行循环，该循环会跳过 i=3 的数字。/pbutton onclick="myFunction()"点击这里/buttonp id="demo"/p...

使用 For...In 声明来遍历数组内的元素 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/title/headbodyp点击下面的按钮，循环遍历对象 "person" 的属性。/pbutton onclick="myFunction()"点击这里...

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onclick事件 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/titlescriptfunction displayDate(){document.getElementById("demo").innerHTML=Date();}/script/headbodyh1我的第一个 JavaScript 程序/h1p id="demo"这是一...

onmouseover 事件 !DOCTYPE htmlhtmlhead meta charset="utf-8" title滴答编程(dida100.com)/title scriptfunction writeText(txt){document.getElementById("desc").innerHTML=txt;}/script/headbodyimg src ="planets.gif" width ="145" height ="126...

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try...catch 语句 !DOCTYPE htmlhtmlheadmeta charset="utf-8"title滴答编程(dida100.com)/titlescriptvar txt="";function message(){try {adddlert("Welcome guest!");}catch(err) {txt="本页有一个错误。\n\n";txt+="错误描述：" + err...

带有确认框的 try...catch 语句 !DOCTYPE htmlhtmlhead meta charset="utf-8" title滴答编程(dida100.com)/title scriptvar txt="";function message(){try{adddlert("Welcome guest!");}catch(err){txt="本页有一个错误。\n\n";txt+="单击...