Changing all to lowercase when getting the nodevalue

[thallasridevi]

Hi all,
I have an xml file like this:
<?xml version="1.0"?>
<links>
<link>http://webservices.ama zon.com/onca/xml?Service=AWS ECommerceServic e,AWSAccessKeyI d=1E0AQ8SH3JCMJ FBG96G2,Operati on=ItemSearch,B rowseNode=1000, ItemSearch.Shar ed.ResponseGrou p=Medium,ItemSe arch.Shared.Sea rchIndex=Books, ItemPage=4</link>

</links>
While parsing through getNodeValue() method, i am getting the value all lower case letters like this:
http://webservices.ama zon.com/onca/xml?service=aws ecommerceservic e,awsaccesskeyi d=1e0aq8sh3jcmj fbg96g2,operati on=itemsearch,b rowsenode=1000, itemsearch.shar ed.responsegrou p=medium,itemse arch.shared.sea rchindex=books, itempage=4

Can anybody please how to get the exact case.

Thanks,
Sridevi