javascript - Why my code gives me a TypeError: x.documentElement is undefined? -


i'm trying xml php:

 <?php     // ...      $row = mysqli_fetch_array($result);      $xml = new domdocument("1.0", "utf-8");      $book = $xml->createelement("book");     $book = $xml->appendchild($book);      $bookid = $xml->createelement("id",$row['id']);     $bookid = $book->appendchild($id);      $bookauthor = $xml->createelement("author",$row['author']);     $bookauthor = $book->appendchild($bookauthor);      $booktitle = $xml->createelement("title", $row['title']);     $booktitle = $book->appendchild($booktitle);      $bookgenre = $xml->createelement("genre",$row['genre']);     $bookgenre = $book->appendchild($bookgenre);      $bookdescription = $xml->createelement("description",$row['description']);     $bookdescription = $book->appendchild($bookdescription);      echo($xml->asxml());      mysql_close($con);     ?>

to js function (using ajax):

function bytitle(title) {      document.getelementbyid("results").innerhtml = "";     var xmldoc;     var output = "";      if (title != "") {          if (window.xmlhttprequest) {              xmlhttp = new xmlhttprequest();         }          xmlhttp.open("get", "getbooksbytitle.php?title=" + title, true);         xmlhttp.send(null);          xmlhttp.onreadystatechange = function () {              if (xmlhttp.readystate == 4 && xmlhttp.status == 200) {                  xmldoc = xmlhttp.responsexml;                 var x = xmldoc.getelementsbytagname('book');                 alert(x.textcontent);                  output = "<table><br><p><b>results:</b></p><table><tr><th>id</th><th>author</th><th>title</th><th>genre</th><th>price</th><th>description</th></tr><tr>";                  output += "<td>" + x.documentelement.getelementsbytagname('id')[0].childnodes[0].nodevalue + "</td>";                 output += "<td>" + x.documentelement.getelementsbytagname('author')[0].childnodes[0].nodevalue + "</td>";                 output += "<td>" + x.documentelement.getelementsbytagname('title')[0].childnodes[0].nodevalue + "</td>";                 output += "<td>" + x.documentelement.getelementsbytagname('genre')[0].childnodes[0].nodevalue + "</td>";                 output += "<td>" + x.documentelement.getelementsbytagname('price')[0].childnodes[0].nodevalue + "</td>";                 output += "<td>" + x.documentelement.getelementsbytagname('description')[0].childnodes[0].nodevalue + "</td></tr></table>";                  document.getelementbyid("results").innerhtml = output;             } }

but unfortunately typeerror:

x.documentelement undefined (:mozilla).

i've tried lot of different "solutions" none of them make difference...

you don't need call x.documentelement have xmldoc should use this:

output += "<td>" + xmldoc.getelementsbytagname('id')[0].childnodes[0].nodevalue + "</td>"; output += "<td>" + xmldoc.getelementsbytagname('author')[0].childnodes[0].nodevalue + "</td>"; output += "<td>" + xmldoc.getelementsbytagname('title')[0].childnodes[0].nodevalue + "</td>"; output += "<td>" + xmldoc.getelementsbytagname('genre')[0].childnodes[0].nodevalue + "</td>"; output += "<td>" + xmldoc.getelementsbytagname('price')[0].childnodes[0].nodevalue + "</td>"; output += "<td>" + xmldoc.getelementsbytagname('description')[0].childnodes[0].nodevalue + "</td></tr></table>";

also: easier consume json server response ajax requests, because you'd need use json.parse(data) use response plain js object.


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