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Sys.Application.addHistoryPoint Strange problem using prototype

Posted By:      Posted Date: October 25, 2010    Points: 0   Category :ASP.Net

Hello.I have inserted in a page

try {
Object.prototype.selectSingleNode = function (sXPath) {
var oEvaluator = new XPathEvaluator();
var oResult = oEvaluator.evaluate(sXPath, this, null,
if (oResult != null) {
return oResult.singleNodeValue;
} else {
return null;
} catch (er) {

The problem is that when i use Sys.Application.addHistoryPoint then my url becomes:
foo.aspx?sid=xxx&#v=227&selectSingleNode=function..... It contains the whole function...
Any ideas please?

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