<script type="text/javascript">
function validateXML(txt)
{

// code for IE
if (window.ActiveXObject)
? {
? var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
? xmlDoc.async="false";
? xmlDoc.loadXML(document.all(txt).value);

? if(xmlDoc.parseError.errorCode!=0)
??? {
??? txt="Error Code: " + xmlDoc.parseError.errorCode + "\n";
??? txt=txt+"Error Reason: " + xmlDoc.parseError.reason;
??? txt=txt+"Error Line: " + xmlDoc.parseError.line;
??? alert(txt);
??? }
? else
??? {
??? alert("No errors found");
??? }
? }
// code for Mozilla, Firefox, Opera, etc.
else if (document.implementation.createDocument)
? {
var parser=new DOMParser();
var text=document.getElementById(txt).value;
var xmlDoc=parser.parseFromString(text,"text/xml");

? if (xmlDoc.documentElement.nodeName=="parsererror")
??? {
??? alert(xmlDoc.documentElement.childNodes[0].nodeValue);
??? }
? else
??? {
??? alert("No errors found");
??? }
? }
else
? {
? alert('Your browser cannot handle XML validation');
? }
}
</script>