Passing Variable in getURL

["amy_jo" <webforumsuser@xxxxxxxxxxxxxx>]

Having a little trouble,its probably something simple but I've not that 
familiar with Java.  

         <cfinput type="button" name="EditPass" value="Edit Bus Pass" 
tooltip="Click here to edit the selected bus pass." 
onclick="getURL('BusPass.cfm?PASSID=+getBusPass.PassID');">

 When I click the button it gives me the following error showing the correct 
link:

 Line 295 Char 1 
 Object Expected
 Code ()
 URL=http://....buspass.cfm?passID=13