Pass two value from one page to another page using javascript

Hai friends,
                  i want to pass data from one page to another page.... USING JAVA SCRIPT
                   i will pass one value like this 
var requestUrl = "Calculation.aspx?distance" = + distance ; This will work good and when i pass the second value in same function it showing me error.....this is line
var requestUrl = "Calculation.aspx?distance" = + distance +"&dropdown=" + selectedvalue ; please tell me a correct answer i will get in calculation.aspx.cs page as
string km = Request.QueryString["distance"]; string dropdown = Request.QueryString["dropdown"];  
Please tell if ...