Problem:

My DataPage is setup to receive a parameter but when no parameter is present, it’s displaying the last used value. How can I clear the value?

Resolution:

If your DataPage is setup to allow blank values for parameters you must append &cbResetParam=1 to the URLs that point to your DataPage. For example:

http://mysite.com/report.html?city=Chicago&cbResetParam=1

This resets the browser’s cache otherwise the previous parameter value is remembered.