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<title>XML DOM - HttpRequest object</title>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
<h1> The XMLHttpRequest Object</h1>
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<h2>Examples</h2>
<p><a target="_blank" href="tryit.asp@filename=try_dom_httprequest_js1">Load a
textfile into a div element with XML HTTP</a></p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_httprequest_js2">Make a
HEAD request with XML HTTP</a></p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_httprequest_js3">Make a
specified HEAD request with XML HTTP</a></p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_httprequest_js4">List data from an XML file with XML HTTP</a></p>
<hr />
<h2>The XMLHttpRequest Object Reference</h2>
<h3>Methods</h3>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3" id="table11">
<tr valign="top">
<th width="45%" align="left">Method</th>
<th width="55%" align="left">Description</th>
</tr>
<tr valign="top">
<td>abort()</td>
<td>Cancels the current request</td>
</tr>
<tr valign="top">
<td><a href="met_http_getallresponseheaders.asp">getAllResponseHeaders()</a></td>
<td>Returns the complete set of http headers as a string</td>
</tr>
<tr valign="top">
<td><a href="met_http_getresponseheader.asp">getResponseHeader("headername")</a></td>
<td>Returns the value of the specified http header</td>
</tr>
<tr valign="top">
<td>open("method","URL",async,"uname","pswd")</td>
<td>Specifies the method, URL, and other optional attributes of a
request<p>The method parameter can have a value of "GET", "POST",
or "PUT" (use "GET" when requesting data and use "POST"
when sending data (especially if the length of the data is
greater than 512 bytes.</p>
<p>The URL parameter may be either a relative or
complete URL.</p>
<p>The async parameter specifies
whether the request should be handled asynchronously or not. true means
that script
processing carries on after the send() method, without waiting for a response. false
means that the script waits for a response before continuing script
processing</p></td>
</tr>
<tr valign="top">
<td>send(content)</td>
<td>Sends the request</td>
</tr>
<tr valign="top">
<td>setRequestHeader("label","value")</td>
<td>Adds a label/value pair to the http header to be sent</td>
</tr>
</table>
<h3>Properties</h3>
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<tr valign="top">
<th width="30%" align="left">Property</th>
<th width="70%" align="left">Description</th>
</tr>
<tr valign="top">
<td>onreadystatechange</td>
<td>An event handler for an event that fires at every state change</td>
</tr>
<tr valign="top">
<td>readyState</td>
<td>Returns the state of the object:<p>0 = uninitialized<br />
1 = loading<br />
2 = loaded<br />
3 = interactive<br />
4 = complete </p></td>
</tr>
<tr valign="top">
<td>responseText</td>
<td>Returns the response as a string</td>
</tr>
<tr valign="top">
<td>responseXML</td>
<td>Returns the response as XML. This property returns an XML document
object, which can be examined and parsed using W3C DOM node tree methods and
properties</td>
</tr>
<tr valign="top">
<td>status</td>
<td>Returns the status as a number (e.g. 404 for "Not Found" or 200 for
"OK")</td>
</tr>
<tr valign="top">
<td>statusText</td>
<td>Returns the status as a string (e.g. "Not Found" or
"OK")</td>
</tr>
</table>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
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