Date Variables in URL

Topic by Nick L

We're adding a browser control to our contact workspace which will import external records for agents to view.  I have the URL string to use, and would like to change the set dates to variables:

ToDate=2/16/2016&FromDate=9/1/2015

I'd like the "ToDate" to be the current date, and the "FromDate" to be 90 days prior, i.e. show the most current 90 days of information.  Can anyone help me create? :)  Thanks.