document.evalute function giving exception

Question

I have a code like

res = doc.evalute(xpathExpr,doc,
                  function(prefix) {return namespaces[prefix] || null;},
                  XPathResult.ANY_TYPE,null );

Here doc is DOM document node

When i run for loop like this

for(i in doc) alert(i);

it gives evaluate method

but when i tried to use this method on dom node it giving me error like

xpathResult not defined...

i'm working in android browser

thanks in advance....

Answer 1

XPathResult.ANY_TYPE

It's not guaranteed that the DOM Level 3 XPath XPathResult interface will actually be represented as a window member called XPathResult. In fact none of the DOM interfaces are specified to be reflected as constructor-functions in window. In most non-IE browsers, many of them are. But Android's browser doesn't seem to support evaluate on an HTMLDocument; I guess that's why it doesn't also provide XPathResult.

So if you want to get a static member like ANY_TYPE the only reliable way to do it is to have an instance of that class already, and access .ANY_TYPE from that. Since you don't have an XPathResult at this point, you're probably best off just saying 0.