why to call alert() between xml parsing in javascript
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Thread: why to call alert() between xml parsing in javascript

  1. #1
    Join Date
    Oct 2006
    Posts
    8

    why to call alert() between xml parsing in javascript

    Hello Dear

    I am parsing my xml using below mention code.but i donot know should use alert("ffff")because if i donot use alert("ffff") it's throws an error "object required"

    You can also try this code with own xmlfile in two ways
    1. By putting comment before "alert("ffff")
    2. By removing the comment "alert("ffff")

    I am sure that if you will use the code with first method you will get the error.

    <SCRIPT LANGUAGE="JavaScript">
    function readXMLData()
    {
    var xmlDocumentObject, sessionNode, committeeNode1,
    attendeesNode
    var firstNameNode, lastNameNode, displayText
    var attributes, statusSenator

    xmlDocumentObject = new ActiveXObject("Microsoft.XMLDOM")
    xmlDocumentObject.load("category.xml")
    alert("fffff")
    sessionNode = xmlDocumentObject.documentElement
    alert(sessionNode.firstChild.xml);
    committeeNode1 = sessionNode.firstChild
    committeeNode = committeeNode1.firstChild
    attributes = committeeNode.attributes
    CategoryId = attributes.getNamedItem("CategoryId")
    outputText = committeeNode.firstChild.nodeValue
    + ' ' + committeeNode.firstChild.nodeValue
    + "'s status is: " + CategoryId
    displayDIV.innerHTML=outputText
    }
    </SCRIPT>


    I am waiting for someones response.

    Thanks

  2. #2
    Join Date
    Apr 2005
    Location
    Norway
    Posts
    3,934

    Re: why to call alert() between xml parsing in javascript

    The XMLDOM object works in either synchronous or asynchronous (default?) mode. When working in synchronous mode the XMLDOM.load(...) function will wait until the document is fully loaded:
    Code:
    xmlDocumentObject = new ActiveXObject("Microsoft.XMLDOM")
    xmlDocumentObject.async = false;
    xmlDocumentObject.load("category.xml")
    
    // at this point you can use the document
    But when loading documents asynchronous the script will continue to run even before the document has been fully loaded:
    Code:
    xmlDocumentObject = new ActiveXObject("Microsoft.XMLDOM")
    xmlDocumentObject.async = true;
    xmlDocumentObject.load("category.xml")
    
    // at this point the document might still be loading, this it's unsafe to use the document
    In the latter case you would need to wait until the document is fully loaded. Using the alert function is not a (good) solution. What you should do is to listen for events thrown by the XMLDOM object:
    Code:
    xmlDocumentObject = new ActiveXObject("Microsoft.XMLDOM")
    
    // set up asynchronous mode
    xmlDocumentObject.async = true;
    
    // register listener for event
    xmlDocumentObject.onreadystatechange = function () {
          if (oXmlDom.readyState == 4) {
               //this part is executed when the document is ready
          }
    };
    
    // load document
    xmlDocumentObject.load("category.xml")
    - petter

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