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281 lines
19 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>YUI Library Examples: Connection Manager: Connection Manager GET Transaction</title>
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#custom-doc { width: 95%; min-width: 950px; }
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#pagetitle {background-image: url(../../assets/bg_hd.gif);}
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<script type="text/javascript">
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//enable passthrough of errors from YUI Event:
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if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
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YAHOO.util.Event.throwErrors = true;
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}
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<body id="yahoo-com" class="yui-skin-sam">
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<div id="custom-doc" class="yui-t2">
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<div id="hd">
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<div id="ygunav">
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<p><em><a href="http://developer.yahoo.com/yui/">YUI Library Home</a></em></p>
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<form action="http://search.yahoo.com/search" id="sitesearchform">
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<input name="vs" type="hidden" value="developer.yahoo.com">
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<input name="vs" type="hidden" value="yuiblog.com">
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<label for="searchinput">Site Search (YDN & YUIBlog): </label>
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<input type="text" id="searchinput" name="p">
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<input type="submit" value="Search" id="searchsubmit" class="ygbt">
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</form> </div>
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<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
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<div id="pagetitle"><h1>YUI Library Examples: Connection Manager: Connection Manager GET Transaction</h1></div>
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</div>
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<div id="bd">
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<div id="yui-main">
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<div class="yui-b">
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<div class="yui-ge">
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<div class="yui-u first example">
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<div class="promo">
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<h1>Connection Manager: Connection Manager GET Transaction</h1>
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<div class="exampleIntro">
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<p>To create a GET transaction using <a href="http://developer.yahoo.com/yui/connection/">Connection Manager</a>, you will need to construct a querystring of key-value pairs and append it to the URL.
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The following code example provides a step-by-step approach to creating a simple GET transaction.</p>
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<p>Click "Send a GET Request" below to try it out, then read the description below to learn how to create a simple transaction using Connection Manager.</p>
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</div>
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<div class="example-container module ">
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<div class="hd exampleHd">
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<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="get_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
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</div> <div id="example-canvas" class="bd">
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
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<div id="container"></div>
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<script>
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var div = document.getElementById('container');
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var handleSuccess = function(o){
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YAHOO.log("The success handler was called. tId: " + o.tId + ".", "info", "example");
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if(o.responseText !== undefined){
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div.innerHTML = "<li>Transaction id: " + o.tId + "</li>";
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div.innerHTML += "<li>HTTP status: " + o.status + "</li>";
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div.innerHTML += "<li>Status code message: " + o.statusText + "</li>";
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div.innerHTML += "<li>HTTP headers: <ul>" + o.getAllResponseHeaders + "</ul></li>";
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div.innerHTML += "<li>Server response: " + o.responseText + "</li>";
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div.innerHTML += "<li>Argument object: Object ( [foo] => " + o.argument.foo +
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" [bar] => " + o.argument.bar +" )</li>";
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}
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}
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var handleFailure = function(o){
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YAHOO.log("The failure handler was called. tId: " + o.tId + ".", "info", "example");
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if(o.responseText !== undefined){
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div.innerHTML = "<ul><li>Transaction id: " + o.tId + "</li>";
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div.innerHTML += "<li>HTTP status: " + o.status + "</li>";
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div.innerHTML += "<li>Status code message: " + o.statusText + "</li></ul>";
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}
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}
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var callback =
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{
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success:handleSuccess,
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failure:handleFailure,
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argument: { foo:"foo", bar:"bar" }
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};
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var sUrl = "assets/get.php?username=anonymous&userid=0";
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function makeRequest(){
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var request = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);
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YAHOO.log("Initiating request; tId: " + request.tId + ".", "info", "example");
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}
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YAHOO.log("As you interact with this example, relevant steps in the process will be logged here.", "info", "example");
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</script>
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<form><input type="button" value="Send a GET Request" onClick="makeRequest();"></form>
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<!--END SOURCE CODE FOR EXAMPLE =============================== -->
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</div>
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</div>
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</div>
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<h2 class="first">Using Connection Manager to Retrieve a File via HTTP GET</h2>
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<h3>Source file and dependencies</h3>
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<p>Load the <a href="http://developer.yahoo.com/yui/yahoo/">Yahoo Global Object</a> and <a href="http://developer.yahoo.com/yui/connection/">Connection Manager</a> source files:</p>
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<textarea name="code" class="JScript" cols="60" rows="1">
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<script src="yahoo.js"></script>
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<script src="event.js"></script>
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<script src="connection.js"></script>
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</textarea>
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<h3>Assemble the Querystring</h3>
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<p>Construct a querystring with two key-value pairs of <code>username = anonymous</code> and <code>userid = 0</code>:</p>
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<textarea name="code" class="JScript" cols="60" rows="1"> /*
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*
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* Create a querystring with example key-value pairs of
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* username and userid. Remember to encode the querystring
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* if and when the string contains special characters.
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*
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*/
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var sUrl = "php/get.php?username=anonymous&userid=0";</textarea>
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<h3>The Callback Object</h3>
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<p>Create a callback object to handle the response, and pass an object literal to both <code>success</code> and <code>failure</code> handlers as the argument.</p>
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<textarea name="code" class="JScript" cols="60" rows="1">
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var div = document.getElementById('container');
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var handleSuccess = function(o){
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if(o.responseText !== undefined){
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div.innerHTML = "<li>Transaction id: " + o.tId + "</li>";
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div.innerHTML += "<li>HTTP status: " + o.status + "</li>";
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div.innerHTML += "<li>Status code message: " + o.statusText + "</li>";
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div.innerHTML += "<li>HTTP headers: <ul>" + o.getAllResponseHeaders + "</ul></li>";
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div.innerHTML += "<li>Server response: " + o.responseText + "</li>";
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div.innerHTML += "<li>Argument object: Object ( [foo] => " + o.argument.foo +
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" [bar] => " + o.argument.bar +" )</li>";
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}
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}
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var handleFailure = function(o){
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if(o.responseText !== undefined){
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div.innerHTML = "<li>Transaction id: " + o.tId + "</li>";
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div.innerHTML += "<li>HTTP status: " + o.status + "</li>";
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div.innerHTML += "<li>Status code message: " + o.statusText + "</li>";
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}
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}
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var callback =
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{
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success:handleSuccess,
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failure: handleFailure,
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argument: { foo:"foo", bar:"bar" }
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};</textarea>
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<h3>Initiate the GET Transaction</h3>
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<p>Call <code>YAHOO.util.Connect.asyncRequest</code> to send the request to <code>get.php</code>,
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and the PHP file will return the output of <code>$_POST</code> via <code>print_r()</code>.
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The <code>handleSuccess</code> callback will print the response object's properties, including
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the server response data.
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</p>
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<textarea name="code" class="JScript" cols="60" rows="1">var request = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);</textarea>
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<h2>Configuration for This Example</h2>
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<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?event&connection&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
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</div>
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<div class="yui-u">
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<div id="loggerModule" class="yui-skin-sam">
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<h3 class="firstContent">YUI Logger Output:</h3>
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<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p>
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<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="get_log.html">Reload with logging<br />
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and debugging enabled.</a></span></span></p></div>
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</div>
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<div id="examples">
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<h3>Connection Manager Examples:</h3>
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<div id="exampleToc">
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<ul>
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<li class='selected'><a href='../connection/get.html'>Connection Manager GET Transaction</a></li><li><a href='../connection/post.html'>Connection Manager POST Transaction</a></li><li><a href='../connection/abort.html'>Connection Manager Transaction Timeout</a></li><li><a href='../connection/weather.html'>Retrieving a Yahoo! Weather RSS Feed</a></li><li><a href='../connection/xdr.html'>Cross-Domain Transactions with Connection Manager</a></li><li><a href='../connection/global_customevents.html'>Subscribing to Connection Manager Global Events</a></li><li><a href='../connection/callback_customevents.html'>Subscribing to Connection Manager's Custom Events via the Callback Object</a></li><li><a href='../imagecropper/conn_crop.html'>Connection Manager assisted image crop (included with examples for ImageCropper Control (beta))</a></li><li><a href='../treeview/dynamic_tree.html'>Dynamically Loading Node Data (included with examples for TreeView Control)</a></li><li><a href='../editor/post_editor.html'>Editor Data Post with Connection Manager (included with examples for Rich Text Editor)</a></li><li><a href='../layout/calrte_layout.html'>Simple Application (included with examples for Layout Manager)</a></li> </ul>
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</div>
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</div>
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<div id="module">
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<h3>More Connection Manager Resources:</h3>
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<ul>
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<li><a href="http://developer.yahoo.com/yui/connection/">User's Guide</a> (external)</li>
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<li><a href="../../docs/module_connection.html">API Documentation</a></li>
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<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/connection.pdf">Cheat Sheet PDF</a> (external)</li></ul>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="yui-b" id="tocWrapper">
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<!-- TABLE OF CONTENTS -->
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<div id="toc">
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<ul>
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<li class="sect first">Yahoo! UI Library</li><li class="item"><a title="The Yahoo! User Interface Library (YUI)" href="http://developer.yahoo.com/yui/">Home (external)</a></li><li class="item"><a title="The Yahoo! 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(external)</a></li><li class="item"><a title="Best practices for working with web services while protecting user privacy" href="http://developer.yahoo.com/security/">Security Best Practices (external)</a></li></ul>
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<div id="ft">
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<p class="first">Copyright © 2010 Yahoo! Inc. All rights reserved.</p>
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<p><a href="http://privacy.yahoo.com/privacy/us/devel/index.html">Privacy Policy</a> -
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<a href="http://docs.yahoo.com/info/copyright/copyright.html">Copyright Policy</a> -
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<a href="http://careers.yahoo.com/">Job Openings</a></p>
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