GO Tag
The <go> task represents the action of going to a new card.  
 - The content for the 
<go> tag is optional.
  
 - The 
<go> tag can contain <postfield> or <setvar> tag.
  
Where to go is specified with the href attribute.
For example,
   <go href="someurl" method="method">
      ... <postfield> ...
      ... <setvar> ...
   </go>
 href: It is required and is the URL of the new card.
The URL usually cannot exceed 255 characters in length. 
 
 method: The optional method attribute dictates the HTTP submission method. 
There are only two permitted values:
  
  
   post: A post submission includes the data with the submission. 
    The encoded form input is sent via stdin. 
    
   get: A get submission appends the data as a query to the URL.
    The encoded form input in the environment variable QUERY_STRING.
    
  
  
 POSTFIELD Tag
The <postfield> tag is used to set a name/value pair that can be transmitted to an origin server (source of the request) during a URL request. 
The name is set by the name attribute and must be a valid WML variable name. 
The value is set by the value attribute.
For example,
   <postfield name="somename" value="somevalue"/>
A <go> element can contain one or more <postfield> elements. 
If the destination of a <go> element is a card within the same deck, all of the <postfield> elements will be ignored.