strong an xml into jQuery variable

strong an xml into jQuery variable

Hi All, I am new to jQuery as well as this forum. I am working in Siebel CRM. In siebel there are business service like web service. It is used to interact with other systems. BS is invoked after passing arguments which is stored in an Input Property Set. The result is stored in an Output property set. In my case there is an attribute in output property set that stores an XML received from External System. I need to parse this XML without storing it.How can I do that. I tried storing it in variable and parse it afterwards but on alerting this variable I get " undefined".Please suggest any way.