Open URL with CMD file

What to open web page, and submit form via CMD script:



set /p UserName=   What is your CUA user ID? 
echo(
start ""  http://test.law.cua.edu/form/printer-install.asp?name=%UserName%^&explanation=Library_Prnt_v3b^&OS=Windows^&Submit=Submit"


The URL has variable, enclosed by %  %,  and &'s which must be escaped via ^

http://test.law.cua.edu/form/printer-install.asp.asp?name=%UserName%&explanation=Library_Prnt_v3b&OS=Windows&Submit=Submit"