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      The Minibrowser allows the usage of variables. The var callback returns the corresponding value for the given variable.


      There are two ways to initialize a variable:

      1. By adding it to the URL when calling the Minibrowser page. Example: http://link_to_the_minibrowser_code.xml#var:myvar=somevalue
      2. By checking if the variable is empty and, if yes, refresh the page via mb_nop with the variable as parameter:

        <If condition="$(empty:$(var:myvar))">
        	<fetch mil="1">phone://mb_nop#var:myvar=somevalue</fetch>
        </If>


      Example 1: simple variable initialization

      <?xml version="1.0" encoding="UTF-8"?>
      <SnomIPPhoneText id="text">
      	<If condition="$(empty:$(var:myvar))">
      		<fetch mil="1">phone://mb_nop#var:myvar=somevalue</fetch>
      	</If>
          <Text>Variable is $(var:myvar)</Text>
      </SnomIPPhoneText>

      Result when the variable value was added to the Minibrowser URL (URL called: http://10.110.16.61/xml/minibrowser/tests.xml#var:myvar=whatever)

      Result when the variable value was not added to the Minibrowser URL (URL called: http://10.110.16.61/xml/minibrowser/tests.xml)


      Example 2: Show the variable first_page before and after a value is assigned to it. The value of the callback will only last until the minibrowser is closed.

      <?xml version="1.0" encoding="UTF-8"?>
      <SnomIPPhoneBatch>
          <SnomIPPhoneText id="page0">
              <Title>page 0</Title>
              <SoftKeyItem>
                  <Name>*</Name>
                  <Url>http://link_to_this_example.xml#sub=*[@id="page1"]</Url>
              </SoftKeyItem>
              <Text>
                  var:first_page: $(var:first_page)
                  <br />
                  Press * to continue
              </Text>
          </SnomIPPhoneText>
          <SnomIPPhoneText id="page1">
              <Title>page 1</Title>
              <SoftKeyItem>
                  <Name>*</Name>
                  <Url>http://link_to_this_example.xml#sub=*[@id="page2"]&amp;var:first_page=$(urlencode:hello world)</Url>
              </SoftKeyItem>
              <Text>
                  Pressing * will set variable 'var_first_page' to value 'hello_world'
                  <br />
                  Press * to continue
              </Text>
          </SnomIPPhoneText>
          <SnomIPPhoneText id="page2">
              <Title>page 2</Title>
              <SoftKeyItem>
                  <Name>*</Name>
                  <Url>http://link_to_this_example.xml#sub=*[@id="page0"]</Url>
              </SoftKeyItem>
              <Text>
                  var:first_page: $(var:first_page) <br />
      	        Press * to continue to Page0
              </Text>
          </SnomIPPhoneText>
      </SnomIPPhoneBatch>


      Result: