标签：chm i++ section rgb 图像 cell div else 删除
什么叫DOM?
DOM是文档对象模型(Document Object Model，是基于浏览器编程（在本教程中，可以说就是DHTML编程）的一套API接口，W3C出台的推荐标准，每个浏览器都有一些细微的差别，其中以Mozilla的浏览器最与标准接近。
DOM属于浏览器，而不是JavaScript语言规范里的规定的核心内容。
查找元素
1、直接查找
| 方法名 | 描述 |
| getElementById(id) (document) | 获取有指定惟一ID属性值文档中的元素 |
| getElementsByTagName_r(name) | 返回当前元素中有指定标记名的子元素的数组 |
| document.getElementsByClassName | 根据属性获取标签集合 |
| getAttribute(name) | 返回元素的属性值，属性由name指定 |
1>document.getElementById(‘id‘)
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<body> <div id="zhang"> 不帅 </div> <script type="text/javascript"> var i = document.getElementById(‘zhang‘); //查找指定的id i.innerText = ‘很帅‘; //innerText修改指定的字符串 </script></body> |
显示效果，当我们打开IE的时候不帅就会被修改为很帅
2>getElementsByTagName_r(name)
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<body> <div name="zhang"> 不帅 </div> <script type="text/javascript"> var i = document.getElementByTagNmae(‘zhang‘); //查找指定的name名 i.innerText = ‘很帅‘; //innerText修改指定的字符串 </script></body> |
其显示效果一样
3>document.getElementsByClassName
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<body> <div class="zhang"> 不帅 </div> <script type="text/javascript"> var i = document.getElementClassName(‘zhang‘); //查找指定的class名 i.innerText = ‘很帅‘; //innerText修改指定的字符串 </script></body> |
2、间接查找
| 属性名 | 描述 |
| childNodes | 返回当前元素所有子元素的数组 |
| childNodes | 返回当前元素的所有子元素 |
| firstChild | 返回当前元素的第一个下级子元素 |
| lastChild | 返回当前元素的最后一个子元素 |
| nextSibling | 返回紧跟在当前元素后面的元素 |
| previousSibling | 返回紧跟在当前元素前面的元素 |
| parentElement | 返回其父节点标签元素 |
| children | 返回其所有子标签 |
| firstElementChild | 返回第一个子标签元素 |
| lastElementChild | 返回最后一个子标签元素 |
| nextElementtSibling | 返回下一个兄弟标签元素 |
| previousElementSibling | 返回上一个兄弟标签元素 |
利用XML的强大功能和灵活性，将XML作为浏览器和服务器之间的通信介质。
操作元素
1、动态创建内容时所用的W3C DOM属性和方法
| 属性/方法 | 描述 |
| document.createElement_x(tagName) | 文档对象上的createElement_x方法可以创建由tagName指定的元素。如果以串div作为方法参数，就会生成一个div元素 |
| document.createTextNode(text) | 文档对象的createTextNode方法会创建一个包含静态文本的节点 |
| <element>.appendChild(childNode) | appendChild方法将指定的节点增加到当前元素的子节点列表（作为一个新的子节点）。 |
| <element>.setAttribute(name, value) | 这些方法分别获得和设置元素中name属性的值 |
| <element>.insertBefore(newNode, targetNode) | 将节点newNode作为当前元素的子节点插到targetNode元素前面 |
| <element>.removeAttribute(name) | 这个方法从元素中删除属性name |
| <element>.removeChild(childNode) | 这个方法从元素中删除子元素childNode |
| <element>.replaceChild(newNode, oldNode) | 这个方法将节点oldNode替换为节点newNode |
| <element>.hasChildnodes() | 这个方法返回一个布尔值，指示元素是否有子元素 |
2、标签内容
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innerText 获取标签文本内容innerHTML 获取HTML内容value 获取值，即form提交表单的值 |
即实例如下：
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<div class="zhang">1111</div><div class="yan">2222</div><input class="lin" type="text" value="张岩林"><script> document.getElementsByClassName("zhang").innertext = 123; // 获取类名为zhang的标签并把内容改为123 document.getElementsByClassName("yan").innerHTML = 456; //获取类名为yan的标签并把内容改为456 document.getElementsByClassName("lin").value = "张岩林很帅"; //获取类名为lin的标签并把内容改为张岩林很帅</script> |
3、属性
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attributes // 获取所有标签属性setAttribute(key,value) // 设置标签属性getAttribute(key) // 获取指定标签属性 |
通过自定义属性可以做一个全选，反选，取消选择的案例，代码如下：
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body><div> <input type="button" value="全选" onclick="Checkall();"> <input type="button" value="取消" onclick="Cancleall();"> <input type="button" value="反选" onclick="recvall();"></div><div id = "i1"> <ul> <li><input type="checkbox" value="1" class="c1">篮球</li> <li><input type="checkbox" value="2" class="c1">足球</li> <li><input type="checkbox" value="3" class="c1">排球</li> </ul></div><script> function Checkall() { var b = document.getElementsByClassName("c1"); for (var i = 0 ;i < b.length;i++){ var check = b[i]; check.checked = true } } function Cancleall() { var b = document.getElementsByClassName("c1"); for (var i = 0 ;i < b.length;i++){ var check = b[i]; check.checked = false } } function recvall() { var b = document.getElementsByClassName("c1"); for (var i = 0 ;i < b.length;i++){ var check = b[i]; if (check.checked){ check.checked = false }else { check.checked = true } } }</script></body></html>全选、反选、取消案例 |
注：onclick是属于点击事件，后面会提到
4、class操作
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className // 获取所有类名classList.remove(cls) // 删除指定类classList.add(cls) // 添加类 |
当我们鼠标放到全部商品的时候，下面就出现好多商品，其商品是属于隐藏的，触发事件以后他才显示出来，其中间的操作就是定义了一个css隐藏属性，鼠标放上去后，移除CSS隐藏属性；鼠标移走又把隐藏属性给添加上去。
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<!DOCTYPE html><html><head lang="en"> <meta charset="UTF-8"> <title>隐藏</title> <style> .hide{ display: none; } </style></head><body><span onmouseover="mouOver();" onmouseout="mouOut();">放这上面有东西出来，不放东西又消失</span><div class="hide" id = "zhangyanlin" style="font-size: 60px">张岩林好帅</div><script> function mouOver() { document.getElementById("zhangyanlin").classList.remove("hide"); } function mouOut() { document.getElementById("zhangyanlin").classList.add("hide"); }</script></body></html>来个案例醒醒脑 |
5、标签操作
dom创建标签，添加到指定位置
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// 方式一var zhang = "<input type=‘text‘ />";xxx.insertAdjacentHTML("beforeEnd",zhang);xxx.insertAdjacentElement(‘afterBegin‘,document.createElement(‘a‘)) //注意：第一个参数只能是‘beforeBegin‘、 ‘afterBegin‘、 ‘beforeEnd‘、 ‘afterEnd‘ // 方式二var tag = document.createElement(‘div‘)xxx.appendChild(tag) //往后追加一个div元素xxx.insertBefore(tag,xxx[1]) //插到指定位置，可根据索引 |
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> <div> <div> <input type="text" /> <input type="button" value="添加" onclick="AddElement(this);" /> </div> <div style="position: relative;"> <ul id="commentList"> <li>alex</li> <li>eric</li> </ul> </div> </div> <script> function AddElement(ths) { // 获取输入的值 var val = ths.previousElementSibling.value; ths.previousElementSibling.value = ""; var commentList = document.getElementById(‘commentList‘); //第一种形式，字符串方式 //var str = "<li>" + val + "</li>"; // ‘beforeBegin‘、 ‘afterBegin‘、 ‘beforeEnd‘、 ‘afterEnd‘ // beforeEnd内部最后 // beforeBegin 外部上边 //afterBegin 内部贴身 //afterEnd 外部贴墙 //commentList.insertAdjacentHTML("beforeEnd",str); //第二种方式，元素的方式 var tag = document.createElement(‘li‘); tag.innerText = val; var temp = document.createElement(‘a‘); temp.innerText = ‘百度‘; tag.appendChild(temp); // commentList.appendChild(tag); commentList.insertBefore(tag,commentList.children[1]); } </script></body></html>添加标签操作案例 |
6、样式操作
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<body><div id = i1>张岩林很帅</div><script>var obj = document.getElementById(‘i1‘);obj.style.fontSize = "32px";obj.style.backgroundColor = "red";</script></body> |
效果如下：
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <style> .bb{ color: #9a9a9a; } .aa{ color: black; } </style></head><body> <input class="bb" value="请输入内容" onfocus="inpAtu(this);" onblur="onBtu(this);"> <script> function inpAtu(ths) { ths.className = "aa"; var text = ths.value; if (text == "请输入内容"){ ths.value = ""; } } function onBtu(ths) { var text = ths.value; if (text == "请输入内容" || text.trim().length == 0){ ths.className = "bb"; ths.value = "请输入内容"; } } </script></body></html>input输入框提示 |
7、位置操作
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总文档高度document.documentElement.offsetHeight 当前文档占屏幕高度document.documentElement.clientHeight 自身高度tag.offsetHeight 距离上级定位高度tag.offsetTop 父定位标签tag.offsetParent 滚动高度tag.scrollTop |
网页右下角有个返回顶部，一点就返回到上面了，其实就是计算这些高度；还有当你鼠标往下拉的时候，左边菜单栏相对应的样式都会变。
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<!DOCTYPE html><html><head lang="en"> <meta charset="UTF-8"> <title></title></head><style> body{ margin: 0px; } img { border: 0; } ul{ padding: 0; margin: 0; list-style: none; } h1{ padding: 0; margin: 0; } .clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; } .wrap{ width: 980px; margin: 0 auto; } .pg-header{ padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#303a40; -webkit-box-shadow: 0 2px 5px rgba(0,0,0,.2); -moz-box-shadow: 0 2px 5px rgba(0,0,0,.2); box-shadow: 0 2px 5px rgba(0,0,0,.2); } .pg-header .logo{ float: left; padding:5px 10px 5px 0px; } .pg-header .logo img{ vertical-align: middle; width: 110px; height: 40px; } .pg-header .nav{ line-height: 50px; } .pg-header .nav ul li{ float: left; } .pg-header .nav ul li a{ display: block; color: #ccc; padding: 0 20px; text-decoration: none; font-size: 14px; } .pg-header .nav ul li a:hover{ color: #fff; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#425a66; } .pg-body{ } .pg-body .catalog{ position: absolute; top:60px; width: 200px; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#fafafa; bottom: 0px; } .pg-body .catalog.fixed{ position: fixed; top:10px; } .pg-body .catalog .catalog-item.active{ color: #fff; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#425a66; } .pg-body .content{ position: absolute; top:60px; width: 700px; margin-left: 210px; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#fafafa; overflow: auto; } .pg-body .content .section{ height: 500px; border: 1px solid red; }</style><body onscroll="ScrollEvent();"><div class="pg-header"> <div class="wrap clearfix"> <div class="logo"> <a href="#"> </a> </div> <div class="nav"> <ul> <li> <a href="#">首页</a> </li> <li> <a href="#">功能一</a> </li> <li> <a href="#">功能二</a> </li> </ul> </div> </div></div><div class="pg-body"> <div class="wrap"> <div class="catalog" id="catalog"> <div class="catalog-item" auto-to="function1"><a>第1张</a></div> <div class="catalog-item" auto-to="function2"><a>第2张</a></div> <div class="catalog-item" auto-to="function3"><a>第3张</a></div> </div> <div class="content" id="content"> <div menu="function1" class="section"> <h1>第一章</h1> </div> <div menu="function2" class="section"> <h1>第二章</h1> </div> <div menu="function3" class="section"> <h1>第三章</h1> </div> </div> </div></div> <script> function ScrollEvent(){ var bodyScrollTop = document.body.scrollTop; if(bodyScrollTop>50){ document.getElementsByClassName(‘catalog‘)[0].classList.add(‘fixed‘); }else{ document.getElementsByClassName(‘catalog‘)[0].classList.remove(‘fixed‘); } var content = document.getElementById(‘content‘); var sections = content.children; for(var i=0;i<sections.length;i++){ var current_section = sections[i]; // 当前标签距离顶部绝对高度 var scOffTop = current_section.offsetTop + 60; // 当前标签距离顶部，相对高度 var offTop = scOffTop - bodyScrollTop; // 当前标签高度 var height = current_section.scrollHeight; if(offTop<0 && -offTop < height){ // 当前标签添加active // 其他移除 active var menus = document.getElementById(‘catalog‘).children; var current_menu = menus[i]; current_menu.classList.add(‘active‘); for(var j=0;j<menus.length;j++){ if(menus[j] == current_menu){ }else{ menus[j].classList.remove(‘active‘); } } break; } } } </script></body></html>滚动菜单 |
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <style> .pg-top{ position: fixed; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#0095bb; height: 40px; width: 40px; bottom: 50px; right: 40px; color: whitesmoke; } .hide{ display: none; } </style></head><body onscroll="Func();"> <div style="height: 3000px;" id = "i1"> <h1>张岩林</h1> </div> <div class="pg-top hide" id = "i2"> <a href="javascript:void(0);" onclick="GoTop();">返回顶部</a> </div><script> function Func() { var scrollTop = document.body.scrollTop; var i1 = document.getElementById("i2"); if (scrollTop>20){ i1.classList.remove("hide") }else { i1.classList.add("hide") } } function GoTop() { document.body.scrollTop = 0; }</script></body></html>返回顶部 |
8、其他操作
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console.log 输出框alert 弹出框confirm 确认框 // URL和刷新location.href 获取URLlocation.href = "url" 重定向location.reload() 重新加载 // 定时器setInterval 多次定时器clearInterval 清除多次定时器setTimeout 单次定时器clearTimeout 清除单次定时器 |
给说下定时器吧，定时器比较有用，比如当我们删除一个邮件的时候，会发现弹出一段对话，邮件已删除，这个是单次定时器，多次定时器在自己特定需求的时候，可以用到
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// 多次定时器案例<input type="button" value="Interval" onclick="Interval();"><input type="button" value="StopInterval" onclick="StopInterval();"> <script> function Interval() { s1 = setInterval(function () { console.log(123) //持续输出123 },500); s1 = setInterval(function () { console.log(123) },500); } function StopInterval() { clearInterval(s1); //清除一个多次定时器 } </script> |
单次定时器
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<div> <input type="button" value="删除" onclick="Delete();"> <input type="button" value="保留当前状态" onclick="UnDelete();"> <div id = "status"></div> </div> <script> function Delete() { document.getElementById("status").innerText = "已删除"; t1 = setTimeout(Clearstatus,1500); } function Clearstatus() { document.getElementById("status").innerText = ""; } function UnDelete() { clearTimeout(t1); //清除完定时器，他会一直显示 } </script> |
事件
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> // 普通事件 <button id = "btn1" onclick="func();">按钮</button> <script> var btn = document.getElementById("btn1"); function func() { alert("普通时间处理") } </script> // 0级处理事件 <button id = "btn2">0级处理按钮</button> <script> var btn = document.getElementById("btn2"); btn.onclick = function () { alert("0级处理按钮") };// btn.onclick = null; // 清除事件处理, 多个事件会被覆盖掉，只剩下最后一个事件 </script> // 2级处理事件 <button id = "btn3">2级处理按钮</button> <script> var btn = document.getElementById("btn3").addEventListener("click",function () { alert("二级处理事件1") }); var btn1= document.getElementById("btn3").addEventListener("click",function () { alert("二级处理事件2") }); //不会被覆盖 </script> <button id = "btn4">完整兼容按钮</button> <script> var btn = document.getElementById("btn4"); if (btn.addEventListener){ btn.addEventListener("click",demo); }else if(btn.attachEvent){ btn.attachEvent("onclick",demo); }else { btn.onclick = demo; } function demo() { alert("整合兼容事件处理") } </script></body></html> |
事件列表：
| 属性 | 此事件什么时候发生(什么时候被触发) |
| onabort | 图象的加载被中断 |
| onblur | 元素失去焦点 |
| onchange | 区域的内容被修改 |
| onclick | 当用户点击某个对象时调用的事件句柄（比点击input标签时执行上面的代码例子） |
| ondblclick | 当用户双击某个对象时调用的事件句柄 |
| onerror | 在加载文档或图像时发生错误 |
| onfocus | 元素获得焦点 |
| onkeydown | 某个键盘按键被按下 |
| onkeypress | 某个键盘按键被按下并松开 |
| onkeyup | 某个键盘被松开 |
| onload | 一张页面或一副图片完成加载 |
| onmousedown | 鼠标按钮被按下 |
| onmousemove | 鼠标移动过来后 |
| onmouseout | 鼠标从某个元素移开 |
| onmouseover | 鼠标移动到某个元素之上 |
| onmouseup | 鼠标按键被松开 |
| onreset | 重置按钮被点击 |
| onresize | 窗口或框架被重新调整大小 |
| onselect | 文本被选中 |
| onsubmit | 确认按钮被点击 |
| onunload | 用户退出页面 |
注：一个标签可以绑定多个事件，this标签当前正在操作的标签，event封装了当前事件的内容。
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <style> ul{ list-style: none; padding: 0; margin: 0; } ul li{ float: left; padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#038CAE; color: white; padding: 15px 20px; } .clearfix:after{ display: block; content: ‘.‘; height: 0; visibility: hidden; clear: both; } .hide{ display: none; } .tab-menu{ border: 1px solid #dddddd; } .tab-menu .title{ padding: 0px 0px 0px 5px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; border-left: 3px solid rgb(108, 226, 108); line-height: 20px; width: 640px; clear: both; border-radius: 0px !important; border-top: 0px !important; border-right: 0px !important; border-bottom: 0px !important; border-image: initial !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; box-sizing: content-box !important; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace !important; min-height: auto !important; color: gray !important;">#dddddd; } .tab-menu .title .active{ color: black; border-top: 2px solid red; } .tab-menu .content{ border: 1px solid #dddddd; min-height: 150px; } </style></head><body> <div style="width: 960px;margin: 0;padding: 0"> <div class="tab-menu"> <div class="title clearfix"> <ul> <li target = "h1" class="active" onclick="Show(this);">价格趋势</li> <li target = "h2" onclick="Show(this);">市场分布</li> <li target = "h3" onclick="Show(this);">其他</li> </ul> </div> <div id = "content" class="content"> <div con = "h1">content1</div> <div con = "h2" class="hide">content2</div> <div con = "h3" class="hide">content3</div> </div> </div> </div><script> function Show(ths) { var target = ths.getAttribute(‘target‘); ths.className = ‘active‘; var brother = ths.parentElement.children; for (var i=0;i<brother.length;i++){ if (ths == brother[i]){ }else { brother[i].removeAttribute("class"); } } var content = document.getElementById("content").children; for (var j=0;j<content.length;j++){ var current_content = content[j]; var con = current_content.getAttribute("con"); if (con == target){ current_content.classList.remove("hide"); }else { current_content.className = "hide"; } } }</script></body></html>标签菜单案例 |
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> <input type="button" onclick="Func();" value="点我啊" /> <div id="i1" > <div class="c1">123</div> <div class="c1" alex="sb">123</div> <div class="c1">123</div> <div class="c1" alex="sb">123</div> <div class="c1" alex="sb">123</div> <div class="c1">123</div> <div class="c1" alex="sb">123</div> <div class="c1">123</div> <!--<input type="text">--> <!--<input type="password">--> <!----> </div> <script> function Func() { // i1 // i1所有孩子,循环每一个孩子，判断如果alex=‘sb‘ var i1 = document.getElementById(‘i1‘); var divs = i1.children; for(var i=0;i<divs.length;i++){ var current_div = divs[i]; var result = current_div.getAttribute(‘alex‘); // console.log(result); if(result == "sb"){ current_div.innerText = "456"; } } } </script></body></html>通过自定义属性改变元素值 |
标签：chm i++ section rgb 图像 cell div else 删除
原文地址：http://www.cnblogs.com/Chenghao-He/p/7056394.html
