DOM和XMLHttpRequest对象的属性和方法,domxmlhttprequest
DOM和XMLHttpRequest对象的属性和方法,domxmlhttprequest
标准XMLHttpRequest操作
方法 |
描述 |
abort() |
停止当前请求 |
getAllResponseHeaders() |
把HTTP请求的所有响应的首部作为建/值返回 |
getResponseHeader(“header”) |
返回指定首部的串值 |
open(String “method”, String ”url, bollean [asynch], String [username], String [password]) |
建立的服务器的调用,method参数可以是post、get或put。url参数可以是相对url或绝对url。这个方法还包括3个可选参数。 |
send(content) |
像服务器发送请求 |
setRequestHeader(“header”,”value”) |
把指定首部设置为所提供的值。在设置任何首部之前必须现调用open(). |
标准XMLHttpRequest属性
方法 |
描述 |
onreadystatechange |
每个状态改变时都会出发这个事件处理器,一般为调用一个javascript函数。 |
readystate |
请求的状态。有5个可取值: 1=未初始化, 2=正在加载, 3=已加载, 4=交互中, 5=完成。 |
responseText |
服务器的响应,表示为一个串。 |
responseXML |
服务器的响应,表示为XML,这个对象一般解析为DOM. |
status |
服务器HTTP状态码(200对应OK,404对应not found(未找到),等等) |
statusText |
HTTP状态码的相应文本(OK或not found(未找到) 等等) |
用于处理XML的DOM元素属性
属性名 |
描述 |
childNodes |
返回当前元素的所有子元素的数组 |
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 |
Nodevalue |
指示表示元素值的读/写属性 |
parentNode |
返回元素的父节点 |
previousSibling |
返回紧邻当前元素之前的元素 |
用于遍历XML的DOM元素方法
方法名 |
描述 |
GetElementById(id) (document) |
获取有指定唯一ID属性值文档中的元素 |
getElementsByTagName(name) |
返回当前元素中有指定标记名的子元素的数组 |
hasChildNodes() |
返回一个布尔值,指示元素是否有子元素 |
getAttribute(name) |
返回元素的属性,属性由name指定 |
动态创建内容时所用的W3C DOM属性和方法
属性/方法 |
描述 |
Docment.createElement(tagName) |
文档对象上的createElement方法可以创建有tagname指定的元素。如果以串DIV为参数,就会生成一个DIV元素。 |
Docment.createTextNode (text) |
文档对象上的createTextNode方法会创建一个包含静态文本的节点。 |
|
appendChild将指定的节点增加到当前节点的子节点列表(作为一个新的子节点)。例如:可以增加一个option元素,做为select元素的子节点。 |
|
这些方法分别设置元素中name属性的值 |
|
|
|
这个方法将节点newNode作为当前元素的子节点插入到targetNode元素的前面 |
|
这个方法从元素中删除属性name |
|
这个方法从元素中删除子元素childNode |
|
这个方法将节点newNode替换为oldNode |
|
这个方法返回一个布尔值,指示元素是否有子元素 |

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