NG Yew Ban's Software Development Blog: Javascript

Wednesday, January 12, 2011

Javascript getElementByTagName XML with namespace prefix

How to use Javascript to retrieve XML data with namespace prefix?

Example:-

We can use getElementByTagName together with namespace prefix to access the element value:-
xmlDoc.getElementsByTagName("ns0:POID")[0].firstChild.nodeValue ;

Whole code to access the XML data with namespace prefix via getElementsByTagName:-



<html><head>



<script language="javascript">



function getXML()



{



var xmlstring = "<?xml version='1.0' ?><ns0:PO xmlns:ns0='http://www.abc.com/PO'><ns0:POID>PO123</ns0:POID><ns0:CustomerID>ABC007</ns0:CustomerID></ns0:PO>";



if (window.DOMParser)



  {



  parser=new DOMParser();



  xmlDoc=parser.parseFromString(xmlstring,"text/xml");



  }



else // Internet Explorer



  {



  xmlDoc=new ActiveXObject("Microsoft.XMLDOM");



  xmlDoc.async="false";



  xmlDoc.loadXML(xmlstring); 



  } 



var x = xmlDoc.getElementsByTagName("ns0:POID")[0].firstChild.nodeValue ;



alert(x);



}



</script>



</head><body onload="javascript:getXML()">



</body></html>

<?xml version='1.0' ?>
<ns0:PO xmlns:ns0='http://www.abc.com/PO'>
<ns0:POID>PO123</ns0:POID>
<ns0:CustomerID>ABC007</ns0:CustomerID>
</ns0:PO>

Friday, March 18, 2005

Disable Control+C in javascript

How to disable control+C in your web page to prevent user simply copy your text? Here is the code:-

<html>
<head>
<script language="javascript">
<!--
function Disable_Control_C() {
var keystroke = String.fromCharCode(event.keyCode).toLowerCase();

if (event.ctrlKey && keystroke == 'c') {
event.returnValue = false; // disable Ctrl+C
}
}
//--!>
</script>
</head>
<body onkeydown="javascript:Disable_Control_C()">
Hello World!
</body>
</html>

NOTE: You may need to disable the right click and menu bar to prevent user to copy from your text.