JavaScript中document对象使用详解

JavaScript 前端之家
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对象属性

代码如下:
标题等价于HTML的<a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.bgColor //设置<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>背景色 document.fgColor //设置前景色(<a href="https://www.jb51.cc/tag/wenbenyanse/" target="_blank" class="keywords">文本颜色</a>) document.linkColor //未点击过的<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>颜色 document.alinkColor //激活<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>(焦点在此<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>上)的颜色 document.vlinkColor //已点击过的<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>颜色 document.URL //设置URL<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a>从而在同一窗口打开另一网页 document.fileCreatedDate //<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>建立日期，只读<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.fileModifiedDate //<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="https://www.jb51.cc/tag/xiugai/" target="_blank" class="keywords">修改</a>日期，只读<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.fileSize //<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>大小，只读<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.cookie //设置和读出cookie document.charset //设置字符集 简体<a href="https://www.jb51.cc/tag/zhongwen/" target="_blank" class="keywords">中文</a>:gb2312 </div></p> <p>====================================================================== body-主体子对象</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="36917" class="copybut" id="copybut36917" onclick="doCopy('code36917')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code36917"> document.body //指定文档主体的开始和结束等价于<body></body> document.body.bgColor //设置或<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>对象后面的背景颜色 document.body.link //未点击过的<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>颜色 document.body.alink //激活<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>(焦点在此<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>上)的颜色 document.body.vlink //已点击过的<a href="https://www.jb51.cc/tag/lianjie/" target="_blank" class="keywords">链接</a>颜色 document.body.text //<a href="https://www.jb51.cc/tag/wenbenyanse/" target="_blank" class="keywords">文本颜色</a> document.body.innerText //设置<body>...</body>之间的文本 document.body.innerHTML //设置<body>...</body>之间的<a href="https://www.jb51.cc/tag/HTMLdaima/" target="_blank" class="keywords">HTML代码</a> document.body.topMargin //<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上边距 document.body.leftMargin //<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>左边距 document.body.rightMargin //<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>右边距 document.body.bottomMargin //<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>下边距 document.body.background //背景<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a> document.body.appendChild(oTag) //动态<a href="https://www.jb51.cc/tag/shengcheng/" target="_blank" class="keywords">生成</a>一个HTML对象 </div></p> <p>常用对象事件</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="14891" class="copybut" id="copybut14891" onclick="doCopy('code14891')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code14891"> document.body.onclick="func()" //鼠标指针单击对象是触发 document.body.onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>ver="func()" //鼠标指针移到对象时触发 document.body.onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>ut="func()" //鼠标指针移出对象时触发 </div></p> <p>====================================================================== location-位置子对象</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="54412" class="copybut" id="copybut54412" onclick="doCopy('code54412')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code54412"> document.location.hash // #号后的部分 document.location.host // 域名+端口号 document.location.hostname // 域名 document.location.href // 完整URL document.location.pathname // 目录部分 document.location.port // 端口号 document.location.protocol // 网络协议(http:) document.location.search // ?号后的部分 </div></p> <p>常用对象事件</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="35849" class="copybut" id="copybut35849" onclick="doCopy('code35849')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code35849"> documeny.location.reload() //刷新网页 document.location.reload(URL) //打开新的网页 document.location.assign(URL) //打开新的网页 document.location.replace(URL) //打开新的网页 </div></p> <p>====================================================================== images集合(<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>中的图象) a)通过集合引用</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="18095" class="copybut" id="copybut18095" onclick="doCopy('code18095')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code18095"> document.images //对应<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上的<img><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.images.length //对应<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上<img><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a>的个数 document.images[0] //第1个<img><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.images //第i-1个<img><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> </div></p> <p>b)通过name<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a>直接引用</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="44799" class="copybut" id="copybut44799" onclick="doCopy('code44799')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code44799"> <img name="oImage"> document.images.oImage //document.images.name<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> </div></p> <p>c)引用<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>的src<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a></p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="64689" class="copybut" id="copybut64689" onclick="doCopy('code64689')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code64689"> document.images.oImage.src //document.images.name<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a>.src </div></p> <p>d)创建一个图象</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="31577" class="copybut" id="copybut31577" onclick="doCopy('code31577')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code31577"> var oImage oImage = new Image() document.images.oImage.src="1.jpg" </div></p> <p>同时在<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上建立一个<img><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a>与之对应就可以<a href="https://www.jb51.cc/tag/xianshi/" target="_blank" class="keywords">显示</a> 示例<a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>(动态创建图象)：</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="30913" class="copybut" id="copybut30913" onclick="doCopy('code30913')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code30913"> <html> <img name=oImage> <script language="javascript"> var oImage oImage = new Image() document.images.oImage.src="1.jpg" </script> </html> <html> <script language="javascript"> oImage=document.caeateElement("IMG") oImage.src="1.jpg" document.body.appendChild(oImage) </script> </html> </div></p> <p>===================================================================== forms集合(<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>中的表单) a)通过集合引用</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="6346" class="copybut" id="copybut6346" onclick="doCopy('code6346')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code6346"> document.forms //对应<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上的<form><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.forms.length //对应<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上<form><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a>的个数 document.forms[0] //第1个<form><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.forms //第i-1个<form><a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a> document.forms.length //第i-1个<form>中的控件数 document.forms.elements[j] //第i-1个<form>中第j-1个控件 </div></p> <p>---------------------------- b)通过<a href="https://www.jb51.cc/tag/biaoqian/" target="_blank" class="keywords">标签</a>name<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a>直接引用</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="80047" class="copybut" id="copybut80047" onclick="doCopy('code80047')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code80047"> <form name="Myform"><input name="myctrl"></form> document.Myform.myctrl //document.表单名.控件名 </div></p> <p>---------------------------- c)访问表单的<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a></p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="32386" class="copybut" id="copybut32386" onclick="doCopy('code32386')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code32386"> document.forms.name //对应<form name><a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.forms.action //对应<form action><a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.forms.encoding //对应<form enctype><a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.forms.target //对应<form target><a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a> document.forms.appendChild(oTag) //动态插入一个控件 </div></p> <p>---------------------------- 示例<a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>(form)：</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="75370" class="copybut" id="copybut75370" onclick="doCopy('code75370')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code75370"> <html> <!--Text控件相关Script--> <form name="Myform"> <input type="text" name="oText"> <input type="password" name="oPswd"> <form> <script language="javascript"> //<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>文本密码框的值 document.write(document.Myform.oText.value) document.write(document.Myform.oPswd.value) </script> </html> </div></p> <p>---------------------------- 示例<a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>(check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>)：</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="99533" class="copybut" id="copybut99533" onclick="doCopy('code99533')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code99533"> <html> <!--checkbox,radio控件相关script--> <form name="Myform"> <input type="check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>" name="chk" value="1">1 <input type="check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>" name="chk" value="2">2 </form> <script language="javascript"> function fun(){ //遍历check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>控件的值并判断是否选中 var length length=document.forms[0].chk.length for(i=0;i<length;i++){ v=document.forms[0].chk.value b=document.forms[0].chk.checked if(b) alert(v=v+"被选中") else alert(v=v+"未选中") } } </script> <a href=# onclick="fun()">ddd</a> </html> </div></p> <p>---------------------------- 示例代码(Select)：</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="27045" class="copybut" id="copybut27045" onclick="doCopy('code27045')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code27045"> <html> <!--Select控件相关Script--> <form name="Myform"> <select name="oSelect"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> </select> </form> <script language="javascript"> //遍历select控件的option项 var length length=document.Myform.oSelect.length for(i=0;i<length;i++) document.write(document.Myform.oSelect.value) </script> <script language="javascript"> //遍历option项并且判断某个option是否被选中 for(i=0;i<document.Myform.oSelect.length;i++){ if(document.Myform.oSelect.selected!=true) document.write(document.Myform.oSelect.value) else document.write("<font color=red>"+document.Myform.oSelect.value+"</font>") } </script> <script language="javascript"> //根据SelectedIndex打印出选中的option //(0到document.Myform.oSelect.length-1) i=document.Myform.oSelect.selectedIndex document.write(document.Myform.oSelect.value) </script> <script language="javascript"> //动态<a href="https://www.jb51.cc/tag/zengjia/" target="_blank" class="keywords">增加</a>select控件的option项 var oOption = document.createElement("OPTION"); oOption.text="4"; oOption.value="4"; document.Myform.oSelect.add(oOption); </script> <html> </div></p> <p>====================================================================== Div集合(<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>中的层)</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="91392" class="copybut" id="copybut91392" onclick="doCopy('code91392')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code91392"> <Div id="oDiv">Text</Div> document.all.oDiv //引用图层oDiv document.all.oDiv.style.display="" //图层设置为可视 document.all.oDiv.style.display="none" //图层设置为隐藏 document.getElementId("oDiv") //通过getElementId引用对象 document.getElementId("oDiv"). document.getElementId("oDiv").display="none" /*document.all表示document中所有对象的集合 只有ie<a href="https://www.jb51.cc/tag/zhichi/" target="_blank" class="keywords">支持</a>此<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a>，因此也用来判断浏览器的种类*/ </div></p> <p>图层对象的4个<a href="https://www.jb51.cc/tag/shuxing/" target="_blank" class="keywords">属性</a></p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="24909" class="copybut" id="copybut24909" onclick="doCopy('code24909')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code24909"> document.getElementById("ID").innerText //动态<a href="https://www.jb51.cc/tag/shuchu/" target="_blank" class="keywords">输出</a>文本 document.getElementById("ID").innerHTML //动态<a href="https://www.jb51.cc/tag/shuchu/" target="_blank" class="keywords">输出</a>HTML document.getElementById("ID").outerText //同innerText document.getElementById("ID").outerHTML //同innerHTML </div></p> <p>---------------------------- 示例<a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>：</p> <p><div class="codetitle"><span><a style="CURSOR: pointer" data="97801" class="copybut" id="copybut97801" onclick="doCopy('code97801')"><U></U></a> <a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>如下:</div><div class="codebody" id="code97801"> <html> <script language="javascript"> function change(){ document.all.oDiv.style.display="none" } </script> <Div id="oDiv" onclick="change()">Text</Div> </html> <html> <script language="javascript"> function changeText(){ document.getElementById("oDiv").innerText="NewText" } </script> <Div id="oDiv" onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>ver="changeText()">Text</Div> </html> </div></p><i class="glyphicon glyphicon-link"></i> 原文链接：https://www.f2er.com/js/56460.html</div> <div class="topcard-tags"><a href="https://www.f2er.com/tag/documentduixiang/" class="tag_link" target="_blank">document对象</a><a 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