5-day(JavaScript基础与DOM2)
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JavaScript与DOM2
鼠标单击事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>鼠标的单击事件</title></head><script type="text/javascript"><!--//点击按钮,隐藏图片function init() { //拿到按钮对象 var btn = document.getElementById("btn"); var btn1 = document.getElementById("btn1"); //注册事件 btn.onclick = function () { //拿到图片对象 var img = document.getElementById("img"); img.style.display = "none"; this.disabled = "true"; } btn1.onclick = function () { var img = document.getElementById("img"); img.style.display = "block"; //删除属性 var btn = document.getElementById("btn"); btn.removeAttribute("disabled"); }}function fun2(obj) { obj.value = "闫博文";}function fun3() { var p = document.getElementById("p"); p.innerHTML = "<img src= 'images/1.jpg' width='200' height='200' id='img'>";}function fun4() { var btn2 = document.getElementById("btn2"); btn2.removeAttribute("onclick")}//--></script><body onload="init()"><img src="images/1.jpg" width="200" height="200" id="img"><br><input type="button" value="图片隐藏" id="btn"><input type="button" value="图片可见" id="btn1"><input type="button" value="西南科技大学" id="btn2" onclick="fun2(this)"><input type="button" value="添加一张图片" id="btn3" onclick="fun3()"><input type="button" value="去掉西南科大按钮单击事件" id="btn4" onclick="fun4()"><p id="p"></p></body></html>
加载与卸载事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>加载与卸载事件</title></head><script type="text/javascript"><!--function init() { alert("你好");}function fun() { alert("西南科技大学");}function fun2() { alert("exit");}//--></script><body onload="init(),fun()" onunload="fun2()">AAAAAAAAAAAA</body></html>
聚焦离焦事件
<script type="text/javascript"><!--function init(obj) { obj.style.border = "1px solid red"; obj.style.backgroundColor = "#FF88FF" obj.style.color = "blue";}function fun1(obj) { if (obj.value == "") { obj.focus();//获得焦点 }}//--></script><body><input type="text" name="" onfocus="init(this)" onblur="fun1(this)"></body>
键盘事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>键盘事件</title></head><script type="text/javascript"><!--/* onkeypress :键盘按下再抬起 onkeydown :键盘按下 onkeyup :键盘抬起 */function init(obj, e) { //按键得到asc码 var key = e.keyCode; obj.value = key;}//--></script><body><input type="text" name="" onkeypress="init(this,event)"></body></html>
提交与重置事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>提交与重置事件</title></head><script type="text/javascript"><!--/* */function check(form) { //拿到文本框 var txt = form.username.value; //判断内容 if (txt == "") { document.getElementById("sname").innerHTML = "<font color = red>* 姓名必须填写</font>"; form.username.focus(); return false; } return true;}//--></script><body><form method="post" action="1鼠标的单击事件.html" onsubmit="return check(this)">姓名:<input type="text" name="username"><span id="sname"></span><br><input type="submit" value="提交"></form></body></html>
提交与重置事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>提交与重置事件</title></head><script type="text/javascript"><!--/* */function check(form) { //拿到文本框 var txt = form.username.value; //判断内容 if (txt == "") { document.getElementById("sname").innerHTML = "<font color = red>* 姓名必须填写</font>"; form.username.focus(); return false; } return true;}function fun() { alert("sss"); return true;}//--></script><body><form method="post" action="1鼠标的单击事件.html" onsubmit="return check(this)" onreset="return fun(this)">姓名:<input type="text" name="username"><span id="sname"></span><br><input type="submit" value="提交"><input type="reset" value="重置"></form></body></html>
选择与改变事件
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>选择与改变事件</title></head><script type="text/javascript"><!--/* onchange :改变的同时,必须失去焦点 */function fun(obj) { alert(obj.value);}function fun1(v) { alert(v);}function fun2(v, index) { alert(v + ":" + index);}//--></script><body><input type="text" name="" onselect="fun(this)" onchange="fun1(this.value)"><select onchange="fun2(this.value,this.selectedIndex)"><option value="china">中国</option><option value="america">美国</option><option value="japan">日本</option></select></body></html>
省市联动
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>省市联动</title></head><script type="text/javascript"><!--var arr = ["中国", "美国", "日本"];arr["中国"] = ["北京", "上海", "钓鱼岛"];arr["美国"] = ["纽约", "华盛顿", "旧金山"];arr["日本"] = ["东京", "大阪", "神户"];arr["北京"] = ["海淀", "朝阳", "昌平", "丰台"];arr["上海"] = ["浦东", "金山", "崇明", "浦西"];arr["钓鱼岛"] = ["钓鱼岛东", "钓鱼岛南", "钓鱼岛西", "钓鱼岛北"];arr["纽约"] = ["纽约1", "纽约2", "纽约3", "纽约4"];arr["华盛顿"] = ["华盛顿1", "华盛顿2", "华盛顿3", "华盛顿4"];arr["旧金山"] = ["旧金山1", "旧金山2", "旧金山3", "旧金山4"];arr["东京"] = ["东京1", "东京2", "东京3", "东京4"];arr["大阪"] = ["大阪1", "大阪2", "大阪3", "大阪4"];arr["神户"] = ["神户1", "神户2", "神户3", "神户4"];function init1() { //填充国家 for (var i = 0; i < arr.length; i++) { //创建option对象 //第一种 var option = new Option(); option.text = arr[i]; option.value = arr[i]; //将option添加到国家select document.getElementById("country").options.add(option); } //填充省市 for (var i = 0; i < arr[arr[0]].length; i++) { //创建option对象 //第一种 var option = new Option(); option.text = arr[arr[0]][i]; option.value = arr[arr[0]][i]; //将option添加到国家select document.getElementById("province").options.add(option); } //填充地区 for (var i = 0; i < arr[arr[arr[0]][0]].length; i++) { //创建option对象 //第一种 var option = new Option(); option.text = arr[arr[arr[0]][0]][i]; option.value = arr[arr[arr[0]][0]][i]; //将option添加到国家select document.getElementById("area").options.add(option); }}function init() { //填充国家 fillData(arr, "country"); //填充省市 fillData(arr[arr[0]], "province"); //填充地区 fillData(arr[arr[arr[0]][0]], "area");}function fillData(arr, id) { //清空省市 document.getElementById(id).options.length = 0; //添加选项 for (var i = 0; i < arr.length; i++) { //创建option对象 /* //第一种 var option = new Option(); option.text = arr[i]; option.value = arr[i]; */ //第二种 var option = new Option(arr[i], arr[i]); //将option添加到select document.getElementById(id).options.add(option); }}function changePro(coun) { //添加省市 fillData(arr[coun], "province"); //添加地区 fillData(arr[arr[coun][0]], "area");}function changeArea(pro) { //添加地区 fillData(arr[pro], "area");}//--></script><body onload="init()">国家:<select id="country" onchange="changePro(this.value)"></select>省市:<select id="province" onchange="changeArea(this.value)"></select>地区:<select id="area"></select></body></html>
document对象的集合属性
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>document对象的集合属性</title></head><script type="text/javascript"><!--function fun() { document.all[6].innerHTML = "你好";//从<head>开始 计数1 document.forms[1].username.value = "张无忌"; document.images[2].src = "images/1.jpg";}//--></script><body onload="fun()"><p></p><form method="post" action="">姓名1:<input type="text" name=""></form><form method="post" action="">姓名2:<input type="text" name="username"></form><form method="post" action="">姓名3:<input type="text" name=""></form><img src="" alt="aa"><br><img src="" alt="aa"><br><img src="" alt="aa"></body></html>
图片轮播
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>9图片轮播</title></head><style>#d { position: relative; top: -30px;}label { margin-left: 23px;}.one { width: 10px; height: 10px; border: 1px solid black; background-color: white;}</style><script type="text/javascript"><!--var n = 0;var t = 0;function init() { var lbs = document.getElementsByTagName("label"); //注册label事件 for (var i = 0; i < lbs.length; i++) { lbs[i].onmouseover = function () { //让事件先停下来 clearTimeout(t); //让图片显示为相应的选项 var num = this.innerText * 1; //拿到img标签 var img = document.getElementById("img"); img.src = "images/" + num + ".jpg"; //清空所以样式 clearStyle(); //让label样式变成one this.className = "one"; } lbs[i].onmouseout = function () { //隔1秒调用fun() t = setTimeout("fun()", 1000); //改变当前n的值 n = this.innerText * 1; } } fun();}function fun() { n++; if (n == 7) n = 1; //拿到图标对象 var img = document.getElementById("img"); img.src = "images/" + n + ".jpg"; //清空所以样式 clearStyle(); //设定相应的label控件的样式 document.getElementById("i" + n).className = "one"; t = setTimeout("fun()", 1000);}function clearStyle() { //先清空所以label的样式 var lbs = document.getElementsByTagName("label"); for (var i = 0; i < lbs.length; i++) { lbs[i].className = ""; }}//--></script><body onload="init()"><div align="center"><img src="images/1.jpg" width="460" height="520" id="img"><div id="d"> <label id="i1"> 1 </label> <label id="i2"> 2 </label> <label id="i3"> 3 </label> <label id="i4"> 4 </label> <label id="i5"> 5 </label> <label id="i6"> 6 </label></div></div></body></html>
DOM技术概述
HTML 文档对象模型(HTML Document Object Model)定义了访问和处理 HTML 文档的标准方法。
- Core DOM:定义了一套标准的针对任何结构化文档的对象
- XML DOM:定义了一套标准的针对 XML 文档的对象
- HTML DOM:定义了一套标准的针对 HTML 文档的对象
DOM节点属性
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>DOM技术概述-节点属性</title></head><body><p id="p">你好</p><script type="text/javascript"><!--var p = document.getElementById("p");alert(p.nodeName + " :" + p.nodeValue + " :" + p.nodeType);//--></script></body></html>
DOM节点的导航
IE11 chrome新版 无法执行
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>DOM节点的导航</title></head><body><table><tr> <td>成龙</td> <td>男</td> <td>60</td></tr><tr> <td>小龙女</td> <td>女</td> <td>18</td></tr><tr> <td>张春华</td> <td>女</td> <td>28</td></tr></table><script type="text/javascript"><!-- //拿到成龙的年龄 //拿到根节点 var root = document.documentElement; //alert(root.nodeName); //拿到body节点 var body = root.lastChild; //alert(body.nodeName); var table = body.firstChild.nextSibling; //alert(body.firstChild.nextSibling.nodeName); //拿到tbody节点 var tbody = table.lastChild; //拿到成龙年龄//nextSibling下一个兄弟//lastChild小儿子 //alert(tbody.nodeName); var age = tbody.firstChild.firstChild.nextSibling; alert(age.nodeName);//--></script></body></html>
获取标签节点对象的方法
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>获取标签节点对象的方法</title></head><body><h1 id="h1">明天休息</h1><script type="text/javascript"><!--//示例: 拿到明天休息的文本//第一种方式var h1 = document.getElementById("h1");//第二种方法var h2 = document.getElementsByTagName("h1");alert(h2[0].innerHTML);//alert(h1.innerHTML);//alert(h1.firstChild.nodeValue);//alert(h1.lastChild.nodeValue);alert(h1.innerText);//--></script></body></html>
列表的文本
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>列表的文本值</title></head><body><ul><li id="bj" value="beijing"> 北京 <h1>海淀</h1> 上海</li><li id="nj" value="nanjing"> 南京</li><br><input type="button" value="li取值" onclick="getLi()"></ul><script type="text/javascript"><!--function getLi() { //拿到北京节点 var li = document.getElementById("bj"); //拿到北京节点的所有子节点 var childs = li.childNodes; for (var i = 0; i < childs.length; i++) { //alert(childs[i].nodeName + ":" + childs[i].nodeValue + ":" + childs[i].nodeType); if (childs[i].nodeType == 1) { //nodeType 值为1 说明其 为标签节点,其就有子节点 alert(childs[i].firstChild.nodeValue); } else { alert(childs[i].nodeValue); } }}//--></script></body></html>
获取下拉列表框的option文本
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>获取下拉列表框的option文本</title></head><body><select name="edu" id="edu"><option value="本科">本科</option><option value="专科">专科</option><option value="高中">高中</option><option value="小学">小学</option><option value="幼儿园">幼儿园</option></select><br><script type="text/javascript"><!--var ops = document.getElementsByTagName("option");for (var i = 0; i < ops.length; i++) { //alert(ops[i].text); alert(ops[i].innerHTML);}//--></script></body></html>
复制、克隆节点
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>获取下拉列表框的option文本</title></head><body><ul><li id="bj" onclick="changeNode()">北京</li><li>湖南</li><li>山东</li></ul><ul><li id="game">打<p>灰机</p></li><li>抓泥鳅</li><li>斗地主</li></ul><script type="text/javascript"><!--function changeNode() { //拿到北京节点 var bjNode = document.getElementById("bj"); //拿到打灰机对象 var gameNode = document.getElementById("game"); //替换 //bjNode.parentNode.replaceChild(gameNode, bjNode); //克隆一份打灰机 var node = gameNode.cloneNode(true); bjNode.parentNode.replaceChild(node, bjNode);}//--></script></body></html>
添加下拉框的选项
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>添加下拉框选项</title></head><script type="text/javascript"><!--function addOptions() { //创建一个新的节点 var option = document.createElement("option"); option.value = "小学"; option.text = "小学"; //拿到下拉框。加入小学 document.getElementsByTagName("select")[0].options.add(option); //第二种方式 //获得select对象 var select = document.getElementsByTagName("select")[0]; select.innerHTML = select.innerHTML + "<option value='幼儿园'>幼儿园</option>" //第二种方式//appendChild//IE不能用}function fun() { //拿到div对象 var d = document.getElementById("d"); //创建一个img标签对象 var img = document.createElement("img"); //指定属性 img.src = "images/1.jpg"; img.style.width = "200px"; img.height = "300";//不写单位 //将图片添加到div中 d.appendChild(img);}//--></script><body><input type="button" value="添加选项" onclick="addOptions()"><input type="button" value="添加图片" onclick="fun()"><select><option>本科</option><option>专科</option><option>高中</option><option>初中</option></select><br><div id="d"></div></body></html>
全选全不选
<!doctype html><html lang="en"><head><meta charset="UTF-8"><title>全选全不选</title></head><script type="text/javascript"><!--function checkAll(flag) { //拿到所有的多选框 var hobbys = document.getElementsByName("hobby"); //循环赋值 for (var i = 0; i < hobbys.length; i++) { hobbys[i].checked = flag; }}function reverseCheck() { //拿到所有的多选框 var hobbys = document.getElementsByName("hobby"); //循环赋值 for (var i = 0; i < hobbys.length; i++) { hobbys[i].checked = !hobbys[i].checked; }}//--></script><body><h1>请选择你的爱好:</h1>全选/全不选<input type="checkbox" name="hobbys" onclick="checkAll(this.checked)"/><br/><input type="checkbox" name="hobby" value="football"/>足球<input type="checkbox" name="hobby" value="basketball"/>篮球<input type="checkbox" name="hobby" value="swim"/>游泳<input type="checkbox" name="hobby" value="singing"/>唱歌<br/><input type="button" value="全选" onclick="checkAll(true)"/> <input type="button" value="全不选" onclick="checkAll(false)"/><input type="button" value="反选" onclick="reverseCheck()"/></body></body></html>
移动下拉框选项(单项)
<!doctype html><html lang="en"><head><meta charset="UTF-8"><title>移动下拉框选项(单项)</title></head><script type="text/javascript"><!--function removeLeft() { //拿到左边下拉框的对象 var leftSel = document.getElementById("left"); //拿到右边的下拉框对象 var rightSel = document.getElementById("right"); //拿到左边下拉框选中的option var op = leftSel.options[leftSel.selectedIndex]; //将选中选项添加到右边下拉框中 rightSel.appendChild(op);}function removeLeftAll() { //拿到左边下拉框的对象 var leftSel = document.getElementById("left"); //拿到右边的下拉框对象 var rightSel = document.getElementById("right"); //循环添加 var length = leftSel.options.length; for (var i = 0; i < length; i++) { rightSel.appendChild(leftSel.options[0]); }}//--></script><body><table align="center"><tr> <td> <select size="10" id="left"> <option>选项1</option> <option>选项2</option> <option>选项3</option> <option>选项4</option> <option>选项5</option> <option>选项6</option> <option>选项7</option> <option>选项8</option> </select> </td> <td> <input type="button" value="--->" onclick="removeLeft()"/><br/> <input type="button" value="===>" onclick="removeLeftAll()"/><br/> <input type="button" value="<---" onclick=""/><br/> <input type="button" value="<===" onclick=""/><br/> </td> <td> <select size="10" id="right"> <option>选项9</option> </select> </td></tr></table></body></html>
移动下拉框选项(多项)
<!doctype html><html lang="en"><head><meta charset="UTF-8"><title>下拉框选项的移动(多项)</title></head><script type="text/javascript"><!--function removeLeft() { //拿到左边下拉框的对象的option数组 var leftOps = document.getElementById("left").options; //拿到右边的下拉框对象 var rightSel = document.getElementById("right"); for (var i = 0; i < leftOps.length; i++) { if (leftOps[i].selected) { //说明选中了 rightSel.appendChild(leftOps[i]); i--; } }}function removeLeftAll() { //拿到左边下拉框的对象 var leftSel = document.getElementById("left"); //拿到右边的下拉框对象 var rightSel = document.getElementById("right"); //循环添加 var length = leftSel.options.length; for (var i = 0; i < length; i++) { rightSel.appendChild(leftSel.options[0]); }}//--></script><body><table align="center"><tr> <td> <select size="10" id="left" multiple> <option>选项1</option> <option>选项2</option> <option>选项3</option> <option>选项4</option> <option>选项5</option> <option>选项6</option> <option>选项7</option> <option>选项8</option> </select> </td> <td> <input type="button" value="--->" onclick="removeLeft()"/><br/> <input type="button" value="===>" onclick="removeLeftAll()"/><br/> <input type="button" value="<---" onclick=""/><br/> <input type="button" value="<===" onclick=""/><br/> </td> <td> <select size="10" id="right"> <option>选项9</option> </select> </td></tr></table></body></html>
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