Identify the part of the html response you're interested in and use the XPath extractor to extract it to a variable: http://jakarta.apache.org/jmeter/usermanual/component_reference.html#XPath_Extractor
And then test the variable with an if controller and execute the appropriate code depending on what the string in the variable is: http://jakarta.apache.org/jmeter/usermanual/component_reference.html#If_Controller -- Bruce Ide flyingrhenqu...@gmail.com