Summary of JavaScript document methods-JS Tutorial-php.cn

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Summary of JavaScript document methods

高洛峰

Nov 28, 2016 pm 03:10 PM

javascript

The following methods are very commonly used, record them to free up some brain space~

document.title      //设置文档标题等价于HTML的<title>标签
document.bgColor    //设置页面背景色
document.fgColor    //设置前景色(文本颜色)
document.linkColor  //未点击过的链接颜色
document.alinkColor //激活链接(焦点在此链接上)的颜色
document.vlinkColor //已点击过的链接颜色
document.URL        //设置URL属性从而在同一窗口打开另一网页
document.fileCreatedDate    //文件建立日期，只读属性
document.fileModifiedDate   //文件修改日期，只读属性
document.fileSize   //文件大小，只读属性
document.cookie     //设置和读出cookie
document.charset    //设置字符集 简体中文:gb2312

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Commonly used object methods:

document.write()                //动态向页面写入内容
document.createElement(Tag)     //创建一个html标签对象
document.getElementById(ID)     //获得指定ID值的对象
document.getElementsByName(Name)    //获得指定Name值的对象
document.body.appendChild(oTag)

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body Main sub-object:

document.body           //指定文档主体的开始和结束等价于<body></body>
document.body.bgColor   //设置或获取对象后面的背景颜色
document.body.link      //未点击过的链接颜色
document.body.alink     //激活链接(焦点在此链接上)的颜色
document.body.vlink     //已点击过的链接颜色
document.body.text      //文本色
document.body.innerText     //设置<body>...</body>之间的文本
document.body.innerHTML     //设置<body>...</body>之间的HTML代码
document.body.topMargin     //页面上边距
document.body.leftMargin    //页面左边距
document.body.rightMargin   //页面右边距
document.body.bottomMargin  //页面下边距
document.body.background    //背景图片
document.body.appendChild(oTag)     //动态生成一个HTML对象

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Commonly used object events:

document.body.onclick="func()" //Clicking the object with the mouse pointer is triggered

document.body.onmouseover="func() " //Triggered when the mouse pointer moves to the object

document.body.onmouseout="func( ;

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

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Directly reference through the nane attribute

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

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Reference the src attribute of the image

1	`document.selection`

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Create an image

document.images //对应页面上的<img>标签
document.images.length //对应页面上<img>标签的个数
document.images[0] //第1个<img>标签
document.images[i] //第i-1个<img>标签

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At the same time, create an tag on the page corresponding to it to display

Sample code (dynamically created Image):

1 2	`<img>` `document.images.oImage` `//document.images.name属性`

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forms collection (form in the page):

Referenced through the collection

1	`document.images.oImage.src` `//document.images.name属性.src`

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Directly referenced through the tag name attribute

var oImage
oImage = new Image()
document.images.oImage.src="1.jpg"

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Accessing the properties of the form:

<html>
<img>
<script>
    var oImage
    oImage = new Image()
    document.images.oImage.src="1.jpg"
</script>
</html>

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Sample code (form):

document.forms          //对应页面上的<form>标签
document.forms.length   //对应页面上<form>标签的个数
document.forms[0]       //第1个<form>标签
document.forms[i]       //第i-1个<form>标签
document.forms[i].length        //第i-1个<form>中的控件数
document.forms[i].elements[j]   //第i-1个<form>中第j-1个控件

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Sample code (checkbox):

1 2	`<form><input></form>` `document.Myform.myctrl` `//document.表单名.控件名`

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Sample code (Select):

document.forms[i].name      //对应<form name>属性
document.forms[i].action    //对应<form action>属性
document.forms[i].encoding  //对应<form enctype>属性
document.forms[i].target    //对应<form target>属性
document.forms[i].appendChild(oTag)     //动态插入一个控件

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Div collection (layer in the page):

<html>
<!--Text控件相关Script-->
<form>
<input>
<input>
<form>
<script>
//获取文本密码框的值
document.write(document.Myform.oText.value)
document.write(document.Myform.oPswd.value)
</script>
</html>

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4 properties of the layer object:

<html>
<!--checkbox,radio控件相关script-->
<form>
<input value="1">1
<input value="2">2
</form>
<script>
function fun()
{
 //遍历checkbox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[i].value
    b=document.forms[0].chk[i].checked
    if(b)
    alert(v=v+"被选中")
        else
    alert(v=v+"未选中")
    }
}
</script>
<a href="http://www.php1.cn/">ddd</a>
</html>

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Sample code:

<html>
<!--Select控件相关Script-->
<form>
<select>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</form>
<script>
 //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[i].value)
</script>
<script>
    //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[i].selected!=true)
            document.write(document.Myform.oSelect[i].value)
        else
            document.write("<font color=red>"+document.Myform.oSelect[i].value+"</font>")
    }
</script>
<script>
    //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[i].value)
</script>
<script>
    //动态增加select控件的option项
    var oOption = document.createElement("OPTION");
    oOption.text="4";
    oOption.value="4";
    document.Myform.oSelect.add(oOption);
</script>
<html>

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