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POload xml file in background
 

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  1. POload xml file in background
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    <p>I have a page that loads an XML file with thousands of Postal Codes into memory. Once the xml is loaded, a textbox and search button are displayed and the user can enter a postal code (zip code) and click search and some results will display. The problem is, the initial load takes a while and the page says "loading..." for 10-15 seconds before the textbox and search button appear. I need to make the search box/button appear faster/immediately, even if it means an extra bit of time on the searches. I admit, I'm more of a .net guy and don't know javascript/ajax real well. Here's the function that loads the xml. Can anyone help?</p> <pre><code>function importXML() { var xmlhttp; if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else { // code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange = function() { if (xmlhttp.readyState==4 &amp;&amp; xmlhttp.status==200) { var i,j; var xmlDoc=xmlhttp.responseXML; for (i=0; i&lt;arrServiceProviders.length;i++) { var regionList = xmlDoc.getElementsByTagName("region"); var postalCodeList = regionList[i].getElementsByTagName("postalcode"); for (j=0;j&lt;postalCodeList.length;j++) { arrServiceProviders[i][j]=postalCodeList[j].childNodes[0].nodeValue; } // debug time: //alert(arrServiceProviders[i]); } var searchForm = document.getElementById("search-wrapper"); var loadingPlaceholder = document.getElementById("loading"); loadingPlaceholder.className = "hidden"; searchForm.className = ""; } }; xmlhttp.open("GET","/agency-postal-codes.xml",true); xmlhttp.send(); } </code></pre>
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    1. USGrim
    1. USMark Highfield
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    1. COI'd suggest you start loading your postal codes based on the user input as soon as they start typing in the search box. That way, you'll never have to load ALL the postal codes. I think a select box like [Chosen](http://harvesthq.github.com/chosen/) could help you out on that one.
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      1. USRobin van Baalen
    2. COAnd what should happen if the input box is shown but the xml not loaded? I mean, just moving the unhiding code outside of the load callback is not your problem, is it?
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      1. USBergi
 

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